/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:31:04,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:31:04,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:31:04,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:31:04,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-03 14:31:04,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:31:04,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:31:04,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:31:04,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:31:04,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:31:04,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:31:04,224 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:31:04,225 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:31:04,225 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:31:04,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:31:04,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:31:04,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:31:04,227 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:31:04,227 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:31:04,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:31:04,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:31:04,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:31:04,228 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:31:04,228 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:31:04,228 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:31:04,228 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:31:04,228 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:31:04,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:31:04,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:31:04,229 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:31:04,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:31:04,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:31:04,230 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:31:04,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:31:04,230 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:31:04,230 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:31:04,230 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:31:04,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:31:04,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:31:04,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:31:04,704 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:31:04,710 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:31:04,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl [2021-05-03 14:31:04,711 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-symm.wvr.bpl' [2021-05-03 14:31:04,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:31:04,752 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:31:04,753 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:31:04,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:31:04,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:31:04,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... [2021-05-03 14:31:04,774 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... [2021-05-03 14:31:04,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:31:04,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:31:04,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:31:04,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:31:04,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... [2021-05-03 14:31:04,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... [2021-05-03 14:31:04,794 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... [2021-05-03 14:31:04,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... [2021-05-03 14:31:04,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... [2021-05-03 14:31:04,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... [2021-05-03 14:31:04,802 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... [2021-05-03 14:31:04,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:31:04,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:31:04,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:31:04,805 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:31:04,806 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:31:04,872 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:31:04,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:31:04,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:31:04,873 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:31:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:31:04,873 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:31:04,873 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:31:04,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:31:04,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:31:04,875 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:31:05,281 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:31:05,282 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 14:31:05,284 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:31:05 BoogieIcfgContainer [2021-05-03 14:31:05,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:31:05,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:31:05,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:31:05,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:31:05,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:31:04" (1/2) ... [2021-05-03 14:31:05,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f03b143 and model type chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:31:05, skipping insertion in model container [2021-05-03 14:31:05,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:31:05" (2/2) ... [2021-05-03 14:31:05,309 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-symm.wvr.bpl [2021-05-03 14:31:05,315 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:31:05,315 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:31:05,320 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:31:05,321 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:31:05,404 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 14:31:05,426 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 14:31:05,465 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:31:05,465 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:31:05,465 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:31:05,465 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:31:05,465 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:31:05,465 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:31:05,465 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:31:05,466 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:31:05,484 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-05-03 14:31:05,499 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:05,502 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:31:05,511 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:05,511 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:05,512 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:05,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:05,519 INFO L82 PathProgramCache]: Analyzing trace with hash -257954186, now seen corresponding path program 1 times [2021-05-03 14:31:05,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:05,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834524040] [2021-05-03 14:31:05,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:05,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:05,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:05,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834524040] [2021-05-03 14:31:05,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:31:05,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:31:05,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997645795] [2021-05-03 14:31:05,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:31:05,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:05,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:31:05,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:05,802 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:05,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:05,856 INFO L93 Difference]: Finished difference Result 50 states and 90 transitions. [2021-05-03 14:31:05,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:31:05,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:31:05,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:05,875 INFO L225 Difference]: With dead ends: 50 [2021-05-03 14:31:05,875 INFO L226 Difference]: Without dead ends: 45 [2021-05-03 14:31:05,878 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-03 14:31:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2021-05-03 14:31:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2021-05-03 14:31:05,925 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 12 [2021-05-03 14:31:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:05,925 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2021-05-03 14:31:05,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2021-05-03 14:31:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:31:05,928 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:05,928 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:05,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:31:05,929 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:05,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:05,933 INFO L82 PathProgramCache]: Analyzing trace with hash 255431018, now seen corresponding path program 2 times [2021-05-03 14:31:05,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:05,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285475908] [2021-05-03 14:31:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:06,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285475908] [2021-05-03 14:31:06,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:31:06,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:31:06,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085638105] [2021-05-03 14:31:06,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:31:06,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:31:06,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:06,006 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:06,038 INFO L93 Difference]: Finished difference Result 48 states and 89 transitions. [2021-05-03 14:31:06,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:31:06,039 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:31:06,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:06,041 INFO L225 Difference]: With dead ends: 48 [2021-05-03 14:31:06,042 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 14:31:06,043 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 14:31:06,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2021-05-03 14:31:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-05-03 14:31:06,062 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-05-03 14:31:06,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:06,063 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-05-03 14:31:06,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,063 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-05-03 14:31:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:31:06,066 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:06,066 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:06,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 14:31:06,067 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:06,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1890739742, now seen corresponding path program 3 times [2021-05-03 14:31:06,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:06,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693719379] [2021-05-03 14:31:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:06,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:06,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:06,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693719379] [2021-05-03 14:31:06,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:31:06,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:31:06,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423342010] [2021-05-03 14:31:06,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:31:06,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:06,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:31:06,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:06,130 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:06,167 INFO L93 Difference]: Finished difference Result 36 states and 68 transitions. [2021-05-03 14:31:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:31:06,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:31:06,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:06,169 INFO L225 Difference]: With dead ends: 36 [2021-05-03 14:31:06,169 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 14:31:06,170 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:31:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 14:31:06,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-05-03 14:31:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-05-03 14:31:06,175 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-05-03 14:31:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:06,175 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-05-03 14:31:06,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,176 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-05-03 14:31:06,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:31:06,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:06,176 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:06,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:31:06,177 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:06,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash -309182698, now seen corresponding path program 1 times [2021-05-03 14:31:06,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:06,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585638499] [2021-05-03 14:31:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:31:06,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585638499] [2021-05-03 14:31:06,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:31:06,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:31:06,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903110340] [2021-05-03 14:31:06,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:31:06,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:06,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:31:06,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:06,219 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:06,240 INFO L93 Difference]: Finished difference Result 38 states and 72 transitions. [2021-05-03 14:31:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:31:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:31:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:06,242 INFO L225 Difference]: With dead ends: 38 [2021-05-03 14:31:06,242 INFO L226 Difference]: Without dead ends: 38 [2021-05-03 14:31:06,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:31:06,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-03 14:31:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-03 14:31:06,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.945945945945946) internal successors, (72), 37 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 72 transitions. [2021-05-03 14:31:06,247 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 72 transitions. Word has length 13 [2021-05-03 14:31:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:06,247 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 72 transitions. [2021-05-03 14:31:06,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 72 transitions. [2021-05-03 14:31:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:31:06,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:06,249 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:06,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:31:06,249 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:06,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1319300302, now seen corresponding path program 2 times [2021-05-03 14:31:06,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:06,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797657564] [2021-05-03 14:31:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:06,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:31:06,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797657564] [2021-05-03 14:31:06,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:31:06,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:31:06,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291209866] [2021-05-03 14:31:06,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:31:06,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:06,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:31:06,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:06,299 INFO L87 Difference]: Start difference. First operand 38 states and 72 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:06,316 INFO L93 Difference]: Finished difference Result 59 states and 106 transitions. [2021-05-03 14:31:06,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:31:06,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:31:06,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:06,318 INFO L225 Difference]: With dead ends: 59 [2021-05-03 14:31:06,318 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 14:31:06,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 14:31:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2021-05-03 14:31:06,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-05-03 14:31:06,325 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-05-03 14:31:06,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:06,325 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-05-03 14:31:06,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,326 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-05-03 14:31:06,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:31:06,326 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:06,327 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:06,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-03 14:31:06,327 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:06,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:06,328 INFO L82 PathProgramCache]: Analyzing trace with hash -626720332, now seen corresponding path program 3 times [2021-05-03 14:31:06,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:06,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8891750] [2021-05-03 14:31:06,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:31:06,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8891750] [2021-05-03 14:31:06,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:31:06,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-03 14:31:06,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187358486] [2021-05-03 14:31:06,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:31:06,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:06,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:31:06,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:06,365 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:06,391 INFO L93 Difference]: Finished difference Result 41 states and 76 transitions. [2021-05-03 14:31:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:31:06,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:31:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:06,393 INFO L225 Difference]: With dead ends: 41 [2021-05-03 14:31:06,393 INFO L226 Difference]: Without dead ends: 39 [2021-05-03 14:31:06,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:31:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-03 14:31:06,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-05-03 14:31:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-05-03 14:31:06,404 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-05-03 14:31:06,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:06,405 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-05-03 14:31:06,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-05-03 14:31:06,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:31:06,406 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:06,406 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:06,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-03 14:31:06,406 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:06,407 INFO L82 PathProgramCache]: Analyzing trace with hash -968107418, now seen corresponding path program 1 times [2021-05-03 14:31:06,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:06,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424240977] [2021-05-03 14:31:06,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:06,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424240977] [2021-05-03 14:31:06,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935581169] [2021-05-03 14:31:06,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:06,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:31:06,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:07,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-05-03 14:31:07,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:07,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-05-03 14:31:07,068 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:07,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-05-03 14:31:07,083 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:07,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-05-03 14:31:07,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:07,126 INFO L628 ElimStorePlain]: treesize reduction 74, result has 20.4 percent of original size [2021-05-03 14:31:07,126 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:07,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:07,128 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 2 variables, input treesize:161, output treesize:19 [2021-05-03 14:31:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:07,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:07,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-05-03 14:31:07,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083083913] [2021-05-03 14:31:07,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:31:07,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:31:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:07,229 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:07,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:07,449 INFO L93 Difference]: Finished difference Result 78 states and 141 transitions. [2021-05-03 14:31:07,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:07,452 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:31:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:07,455 INFO L225 Difference]: With dead ends: 78 [2021-05-03 14:31:07,455 INFO L226 Difference]: Without dead ends: 60 [2021-05-03 14:31:07,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:31:07,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-03 14:31:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-05-03 14:31:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-05-03 14:31:07,467 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 14 [2021-05-03 14:31:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:07,467 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-05-03 14:31:07,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-05-03 14:31:07,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:31:07,469 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:07,469 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:07,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-03 14:31:07,685 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:07,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:07,686 INFO L82 PathProgramCache]: Analyzing trace with hash 2061932018, now seen corresponding path program 2 times [2021-05-03 14:31:07,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:07,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208861133] [2021-05-03 14:31:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:08,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208861133] [2021-05-03 14:31:08,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383730748] [2021-05-03 14:31:08,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:31:08,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:08,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:08,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:31:08,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:08,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:08,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:08,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:08,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:08,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:08,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:08,533 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:08,576 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-05-03 14:31:08,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:08,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:08,584 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:08,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:08,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:08,607 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:31:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:08,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:08,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:31:08,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472509136] [2021-05-03 14:31:08,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:31:08,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:31:08,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:31:08,689 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:09,218 INFO L93 Difference]: Finished difference Result 90 states and 166 transitions. [2021-05-03 14:31:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:31:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:09,220 INFO L225 Difference]: With dead ends: 90 [2021-05-03 14:31:09,220 INFO L226 Difference]: Without dead ends: 68 [2021-05-03 14:31:09,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 678.8ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:31:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-03 14:31:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 43. [2021-05-03 14:31:09,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2021-05-03 14:31:09,225 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 14 [2021-05-03 14:31:09,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:09,225 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2021-05-03 14:31:09,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2021-05-03 14:31:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:31:09,226 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:09,226 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:09,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:09,437 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:09,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:09,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1138943690, now seen corresponding path program 3 times [2021-05-03 14:31:09,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:09,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997045073] [2021-05-03 14:31:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:09,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997045073] [2021-05-03 14:31:09,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920865699] [2021-05-03 14:31:09,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:09,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:31:09,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:09,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:31:09,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:09,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:09,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:09,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:09,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:09,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:09,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:10,006 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-05-03 14:31:10,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:10,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:10,015 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:10,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:10,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:10,027 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:31:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:10,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:10,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:31:10,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226465365] [2021-05-03 14:31:10,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:31:10,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:10,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:31:10,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:31:10,085 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:10,330 INFO L93 Difference]: Finished difference Result 61 states and 115 transitions. [2021-05-03 14:31:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:10,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:31:10,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:10,331 INFO L225 Difference]: With dead ends: 61 [2021-05-03 14:31:10,331 INFO L226 Difference]: Without dead ends: 48 [2021-05-03 14:31:10,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 378.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:31:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-03 14:31:10,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2021-05-03 14:31:10,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:10,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-05-03 14:31:10,335 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 14 [2021-05-03 14:31:10,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:10,336 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-05-03 14:31:10,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:10,336 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-05-03 14:31:10,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:31:10,336 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:10,337 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:10,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-03 14:31:10,564 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:10,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2758418, now seen corresponding path program 4 times [2021-05-03 14:31:10,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:10,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034560387] [2021-05-03 14:31:10,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:10,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034560387] [2021-05-03 14:31:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613810077] [2021-05-03 14:31:10,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:10,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:10,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:10,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:31:10,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:11,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:11,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:11,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:11,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:11,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,160 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-05-03 14:31:11,166 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-05-03 14:31:11,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:11,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:11,180 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:11,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:11,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:11,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:11,225 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:11,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:11,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:11,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:11,270 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:11,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:11,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:11,313 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:31:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:11,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:11,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:31:11,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070909636] [2021-05-03 14:31:11,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:31:11,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:11,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:31:11,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:31:11,440 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:11,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:11,746 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-05-03 14:31:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:11,746 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:31:11,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:11,747 INFO L225 Difference]: With dead ends: 80 [2021-05-03 14:31:11,748 INFO L226 Difference]: Without dead ends: 61 [2021-05-03 14:31:11,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 469.6ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-03 14:31:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2021-05-03 14:31:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 93 transitions. [2021-05-03 14:31:11,765 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 93 transitions. Word has length 14 [2021-05-03 14:31:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:11,765 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 93 transitions. [2021-05-03 14:31:11,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 93 transitions. [2021-05-03 14:31:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:31:11,766 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:11,766 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:11,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:11,995 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:11,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:11,996 INFO L82 PathProgramCache]: Analyzing trace with hash 2146038118, now seen corresponding path program 5 times [2021-05-03 14:31:11,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:11,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140845909] [2021-05-03 14:31:11,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:12,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140845909] [2021-05-03 14:31:12,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4891518] [2021-05-03 14:31:12,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:12,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:31:12,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:12,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:31:12,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:12,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:12,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:12,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:12,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:12,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:12,367 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:12,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:12,375 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:12,455 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-05-03 14:31:12,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:12,465 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:12,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:12,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:12,473 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:12,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:12,508 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:12,509 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:31:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:12,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:12,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:31:12,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971362489] [2021-05-03 14:31:12,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:31:12,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:12,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:31:12,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:31:12,646 INFO L87 Difference]: Start difference. First operand 47 states and 93 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:13,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:13,159 INFO L93 Difference]: Finished difference Result 111 states and 203 transitions. [2021-05-03 14:31:13,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:13,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:31:13,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:13,160 INFO L225 Difference]: With dead ends: 111 [2021-05-03 14:31:13,160 INFO L226 Difference]: Without dead ends: 85 [2021-05-03 14:31:13,161 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 627.7ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:31:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-03 14:31:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2021-05-03 14:31:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 105 transitions. [2021-05-03 14:31:13,166 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 105 transitions. Word has length 14 [2021-05-03 14:31:13,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:13,166 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 105 transitions. [2021-05-03 14:31:13,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 105 transitions. [2021-05-03 14:31:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:31:13,167 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:13,167 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:13,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:13,377 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:13,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2024741970, now seen corresponding path program 6 times [2021-05-03 14:31:13,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:13,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187393477] [2021-05-03 14:31:13,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:13,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187393477] [2021-05-03 14:31:13,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847490481] [2021-05-03 14:31:13,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:13,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:31:13,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:13,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:31:13,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:13,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:13,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:13,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:13,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:13,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:13,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:13,752 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-05-03 14:31:13,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:13,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:13,762 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:13,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:13,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:13,777 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:31:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:13,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:13,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:31:13,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578231929] [2021-05-03 14:31:13,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:31:13,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:13,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:31:13,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:31:13,825 INFO L87 Difference]: Start difference. First operand 52 states and 105 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:14,004 INFO L93 Difference]: Finished difference Result 72 states and 140 transitions. [2021-05-03 14:31:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:14,005 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:31:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:14,005 INFO L225 Difference]: With dead ends: 72 [2021-05-03 14:31:14,005 INFO L226 Difference]: Without dead ends: 59 [2021-05-03 14:31:14,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:31:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-03 14:31:14,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-05-03 14:31:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 52 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2021-05-03 14:31:14,009 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 14 [2021-05-03 14:31:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:14,009 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2021-05-03 14:31:14,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2021-05-03 14:31:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:31:14,010 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:14,011 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:14,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:14,225 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:14,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:14,226 INFO L82 PathProgramCache]: Analyzing trace with hash -888556698, now seen corresponding path program 7 times [2021-05-03 14:31:14,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:14,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355745609] [2021-05-03 14:31:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:14,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:14,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355745609] [2021-05-03 14:31:14,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985265021] [2021-05-03 14:31:14,410 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:14,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:14,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:31:14,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:14,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:14,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:14,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:14,535 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:14,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:14,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:14,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:14,551 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:14,618 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-05-03 14:31:14,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:14,628 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:14,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:14,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:14,636 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:14,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:14,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:14,674 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:31:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:14,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:14,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-05-03 14:31:14,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734802335] [2021-05-03 14:31:14,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:31:14,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:14,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:31:14,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:31:14,796 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:15,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:15,069 INFO L93 Difference]: Finished difference Result 91 states and 167 transitions. [2021-05-03 14:31:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:15,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:31:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:15,071 INFO L225 Difference]: With dead ends: 91 [2021-05-03 14:31:15,071 INFO L226 Difference]: Without dead ends: 72 [2021-05-03 14:31:15,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 367.5ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:31:15,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-03 14:31:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2021-05-03 14:31:15,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0588235294117645) internal successors, (105), 51 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:15,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 105 transitions. [2021-05-03 14:31:15,074 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 105 transitions. Word has length 14 [2021-05-03 14:31:15,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:15,075 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 105 transitions. [2021-05-03 14:31:15,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:15,075 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 105 transitions. [2021-05-03 14:31:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:31:15,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:15,076 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:15,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:15,289 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:15,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1260239838, now seen corresponding path program 8 times [2021-05-03 14:31:15,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:15,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372873622] [2021-05-03 14:31:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:15,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372873622] [2021-05-03 14:31:15,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246878660] [2021-05-03 14:31:15,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:15,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:15,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:31:15,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:15,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:15,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:15,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:15,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:15,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:15,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:15,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:15,810 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-05-03 14:31:15,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:15,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:15,819 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:15,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:15,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:15,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:15,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:15,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:15,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:15,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:15,911 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:15,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:15,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:15,951 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:31:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:16,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:16,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:31:16,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369419569] [2021-05-03 14:31:16,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:31:16,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:16,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:31:16,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:31:16,086 INFO L87 Difference]: Start difference. First operand 52 states and 105 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:16,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:16,574 INFO L93 Difference]: Finished difference Result 119 states and 220 transitions. [2021-05-03 14:31:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:16,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:31:16,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:16,575 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:31:16,575 INFO L226 Difference]: Without dead ends: 93 [2021-05-03 14:31:16,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 641.7ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:31:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-03 14:31:16,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 51. [2021-05-03 14:31:16,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.06) internal successors, (103), 50 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:16,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 103 transitions. [2021-05-03 14:31:16,579 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 103 transitions. Word has length 14 [2021-05-03 14:31:16,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:16,579 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 103 transitions. [2021-05-03 14:31:16,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:16,580 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 103 transitions. [2021-05-03 14:31:16,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:31:16,580 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:16,580 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:16,785 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-03 14:31:16,785 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:16,785 INFO L82 PathProgramCache]: Analyzing trace with hash 247547306, now seen corresponding path program 9 times [2021-05-03 14:31:16,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:16,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919718884] [2021-05-03 14:31:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:17,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919718884] [2021-05-03 14:31:17,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158833687] [2021-05-03 14:31:17,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:17,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:31:17,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:31:17,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:17,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:17,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:17,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:17,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:17,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:17,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:17,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:17,318 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-05-03 14:31:17,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:17,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:17,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:17,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:17,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:17,363 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:17,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:17,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:17,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:17,416 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:17,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:17,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:17,445 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:31:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:17,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:17,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:31:17,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219946619] [2021-05-03 14:31:17,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:31:17,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:17,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:31:17,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:31:17,541 INFO L87 Difference]: Start difference. First operand 51 states and 103 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:18,189 INFO L93 Difference]: Finished difference Result 138 states and 254 transitions. [2021-05-03 14:31:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:18,190 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:31:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:18,191 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:31:18,191 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 14:31:18,191 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 822.1ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:31:18,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 14:31:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 58. [2021-05-03 14:31:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:18,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 122 transitions. [2021-05-03 14:31:18,195 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 122 transitions. Word has length 14 [2021-05-03 14:31:18,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:18,195 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 122 transitions. [2021-05-03 14:31:18,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:18,195 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 122 transitions. [2021-05-03 14:31:18,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:18,196 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:18,196 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:18,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:18,413 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1340900102, now seen corresponding path program 10 times [2021-05-03 14:31:18,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:18,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500159009] [2021-05-03 14:31:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:18,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500159009] [2021-05-03 14:31:18,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639065916] [2021-05-03 14:31:18,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:18,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:18,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:18,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:18,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:18,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:31:18,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943590976] [2021-05-03 14:31:18,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:31:18,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:18,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:31:18,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:31:18,581 INFO L87 Difference]: Start difference. First operand 58 states and 122 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:18,657 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-05-03 14:31:18,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:18,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:18,658 INFO L225 Difference]: With dead ends: 90 [2021-05-03 14:31:18,658 INFO L226 Difference]: Without dead ends: 90 [2021-05-03 14:31:18,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-03 14:31:18,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-05-03 14:31:18,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:18,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-05-03 14:31:18,665 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-05-03 14:31:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:18,665 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-05-03 14:31:18,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:18,666 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-05-03 14:31:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:18,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:18,666 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:18,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:18,889 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:18,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:18,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1170063830, now seen corresponding path program 11 times [2021-05-03 14:31:18,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:18,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669466723] [2021-05-03 14:31:18,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:18,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669466723] [2021-05-03 14:31:18,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585870637] [2021-05-03 14:31:18,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:18,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:18,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:18,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:18,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:19,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:19,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:19,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:19,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:19,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:19,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:19,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:19,196 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-05-03 14:31:19,196 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:19,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:19,199 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:31:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:19,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:19,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:31:19,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577135580] [2021-05-03 14:31:19,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:31:19,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:19,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:31:19,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:19,225 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:19,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:19,391 INFO L93 Difference]: Finished difference Result 102 states and 203 transitions. [2021-05-03 14:31:19,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:31:19,392 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:19,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:19,393 INFO L225 Difference]: With dead ends: 102 [2021-05-03 14:31:19,393 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 14:31:19,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:31:19,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 14:31:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-05-03 14:31:19,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1311475409836067) internal successors, (130), 61 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:19,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 130 transitions. [2021-05-03 14:31:19,397 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 130 transitions. Word has length 15 [2021-05-03 14:31:19,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:19,397 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 130 transitions. [2021-05-03 14:31:19,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:19,397 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 130 transitions. [2021-05-03 14:31:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:19,398 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:19,398 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:19,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-03 14:31:19,614 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:19,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:19,614 INFO L82 PathProgramCache]: Analyzing trace with hash 384009810, now seen corresponding path program 12 times [2021-05-03 14:31:19,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:19,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925247466] [2021-05-03 14:31:19,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:19,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925247466] [2021-05-03 14:31:19,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182140794] [2021-05-03 14:31:19,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:19,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:31:19,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:19,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:19,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:19,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:19,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:19,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:19,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:19,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:19,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:31:19,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:19,995 INFO L628 ElimStorePlain]: treesize reduction 70, result has 44.9 percent of original size [2021-05-03 14:31:20,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:20,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:31:20,005 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:20,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:20,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:20,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:31:20,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:20,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:20,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:20,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:31:20,084 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:20,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:20,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:20,107 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:31:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:20,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:20,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:20,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258804940] [2021-05-03 14:31:20,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:20,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:20,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:20,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:20,155 INFO L87 Difference]: Start difference. First operand 62 states and 130 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:20,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:20,479 INFO L93 Difference]: Finished difference Result 101 states and 192 transitions. [2021-05-03 14:31:20,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:20,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:20,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:20,480 INFO L225 Difference]: With dead ends: 101 [2021-05-03 14:31:20,480 INFO L226 Difference]: Without dead ends: 98 [2021-05-03 14:31:20,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:31:20,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-03 14:31:20,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2021-05-03 14:31:20,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.123076923076923) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:20,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 138 transitions. [2021-05-03 14:31:20,484 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 138 transitions. Word has length 15 [2021-05-03 14:31:20,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:20,485 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 138 transitions. [2021-05-03 14:31:20,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:20,485 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 138 transitions. [2021-05-03 14:31:20,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:20,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:20,485 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:20,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-03 14:31:20,705 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:20,705 INFO L82 PathProgramCache]: Analyzing trace with hash 160078342, now seen corresponding path program 13 times [2021-05-03 14:31:20,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:20,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043088516] [2021-05-03 14:31:20,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043088516] [2021-05-03 14:31:20,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761246093] [2021-05-03 14:31:20,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:20,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:20,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:20,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:20,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:20,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:21,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:21,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:21,008 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:21,080 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-05-03 14:31:21,081 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:21,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:31:21,087 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:21,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:21,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:21,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:21,121 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:21,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:21,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:21,149 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:31:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:21,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:21,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:31:21,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884539769] [2021-05-03 14:31:21,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:31:21,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:21,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:31:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:21,202 INFO L87 Difference]: Start difference. First operand 66 states and 138 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:21,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:21,439 INFO L93 Difference]: Finished difference Result 99 states and 198 transitions. [2021-05-03 14:31:21,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:21,440 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:21,443 INFO L225 Difference]: With dead ends: 99 [2021-05-03 14:31:21,443 INFO L226 Difference]: Without dead ends: 99 [2021-05-03 14:31:21,444 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 239.8ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:21,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-03 14:31:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2021-05-03 14:31:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.123076923076923) internal successors, (138), 65 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:21,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 138 transitions. [2021-05-03 14:31:21,448 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 138 transitions. Word has length 15 [2021-05-03 14:31:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:21,448 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 138 transitions. [2021-05-03 14:31:21,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:21,449 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 138 transitions. [2021-05-03 14:31:21,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:21,450 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:21,450 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:21,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-03 14:31:21,651 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:21,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:21,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1520195082, now seen corresponding path program 14 times [2021-05-03 14:31:21,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:21,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999470024] [2021-05-03 14:31:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:21,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999470024] [2021-05-03 14:31:21,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100289975] [2021-05-03 14:31:21,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:21,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:21,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:21,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:21,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:22,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:22,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:22,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:31:22,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:22,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:22,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:22,042 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:22,120 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-05-03 14:31:22,120 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:22,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:22,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:22,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:22,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:22,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:22,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:31:22,162 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:22,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:22,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:22,192 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:31:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:22,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:22,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:31:22,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645689163] [2021-05-03 14:31:22,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:31:22,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:22,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:31:22,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:22,255 INFO L87 Difference]: Start difference. First operand 66 states and 138 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:22,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:22,431 INFO L93 Difference]: Finished difference Result 86 states and 171 transitions. [2021-05-03 14:31:22,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:22,432 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:22,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:22,432 INFO L225 Difference]: With dead ends: 86 [2021-05-03 14:31:22,433 INFO L226 Difference]: Without dead ends: 86 [2021-05-03 14:31:22,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:31:22,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-03 14:31:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2021-05-03 14:31:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:22,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-05-03 14:31:22,436 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 15 [2021-05-03 14:31:22,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:22,436 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-05-03 14:31:22,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:22,436 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-05-03 14:31:22,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:22,436 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:22,436 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:22,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:22,645 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:22,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:22,645 INFO L82 PathProgramCache]: Analyzing trace with hash 727164690, now seen corresponding path program 15 times [2021-05-03 14:31:22,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:22,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888671960] [2021-05-03 14:31:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:22,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888671960] [2021-05-03 14:31:22,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182161855] [2021-05-03 14:31:22,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:22,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:31:22,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:22,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:22,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:22,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186277543] [2021-05-03 14:31:22,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:22,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:22,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:22,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:22,919 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:22,995 INFO L93 Difference]: Finished difference Result 77 states and 158 transitions. [2021-05-03 14:31:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:22,996 INFO L225 Difference]: With dead ends: 77 [2021-05-03 14:31:22,996 INFO L226 Difference]: Without dead ends: 77 [2021-05-03 14:31:22,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-03 14:31:22,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2021-05-03 14:31:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:23,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 133 transitions. [2021-05-03 14:31:23,000 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 133 transitions. Word has length 15 [2021-05-03 14:31:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:23,000 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 133 transitions. [2021-05-03 14:31:23,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 133 transitions. [2021-05-03 14:31:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:23,001 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:23,001 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:23,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-03 14:31:23,205 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:23,206 INFO L82 PathProgramCache]: Analyzing trace with hash 367248172, now seen corresponding path program 16 times [2021-05-03 14:31:23,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:23,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988938882] [2021-05-03 14:31:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:23,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988938882] [2021-05-03 14:31:23,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853799468] [2021-05-03 14:31:23,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:23,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:23,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:23,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:23,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:23,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:23,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:23,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944457276] [2021-05-03 14:31:23,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:23,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:23,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:23,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:23,485 INFO L87 Difference]: Start difference. First operand 64 states and 133 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:23,583 INFO L93 Difference]: Finished difference Result 87 states and 179 transitions. [2021-05-03 14:31:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:23,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:23,585 INFO L225 Difference]: With dead ends: 87 [2021-05-03 14:31:23,585 INFO L226 Difference]: Without dead ends: 87 [2021-05-03 14:31:23,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-03 14:31:23,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-05-03 14:31:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.109375) internal successors, (135), 64 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 135 transitions. [2021-05-03 14:31:23,589 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 135 transitions. Word has length 15 [2021-05-03 14:31:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:23,589 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 135 transitions. [2021-05-03 14:31:23,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 135 transitions. [2021-05-03 14:31:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:23,590 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:23,590 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:23,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:23,817 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:23,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:23,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1077295942, now seen corresponding path program 17 times [2021-05-03 14:31:23,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:23,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79533052] [2021-05-03 14:31:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:23,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:23,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:23,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79533052] [2021-05-03 14:31:23,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82053909] [2021-05-03 14:31:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:23,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:31:23,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:23,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:23,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:24,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:24,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:24,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:31:24,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:24,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:24,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:31:24,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:24,166 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:31:24,166 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:24,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:31:24,171 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:24,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:24,189 INFO L518 ElimStorePlain]: Eliminatee v_prenex_22 vanished before elimination [2021-05-03 14:31:24,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:24,191 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:31:24,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:24,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:24,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:24,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434084156] [2021-05-03 14:31:24,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:24,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:24,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:24,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:24,226 INFO L87 Difference]: Start difference. First operand 65 states and 135 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:24,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:24,370 INFO L93 Difference]: Finished difference Result 73 states and 150 transitions. [2021-05-03 14:31:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:24,371 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:24,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:24,371 INFO L225 Difference]: With dead ends: 73 [2021-05-03 14:31:24,371 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 14:31:24,371 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:24,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 14:31:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 63. [2021-05-03 14:31:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.1129032258064515) internal successors, (131), 62 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 131 transitions. [2021-05-03 14:31:24,374 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 131 transitions. Word has length 15 [2021-05-03 14:31:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:24,374 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 131 transitions. [2021-05-03 14:31:24,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 131 transitions. [2021-05-03 14:31:24,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:24,374 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:24,375 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:24,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:24,585 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1739535948, now seen corresponding path program 18 times [2021-05-03 14:31:24,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:24,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156576727] [2021-05-03 14:31:24,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:24,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156576727] [2021-05-03 14:31:24,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546034416] [2021-05-03 14:31:24,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:24,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:31:24,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:24,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:24,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:24,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:24,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944658727] [2021-05-03 14:31:24,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:24,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:24,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:24,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:24,828 INFO L87 Difference]: Start difference. First operand 63 states and 131 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:24,966 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-05-03 14:31:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:24,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:24,967 INFO L225 Difference]: With dead ends: 94 [2021-05-03 14:31:24,967 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:31:24,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:31:24,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 65. [2021-05-03 14:31:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 136 transitions. [2021-05-03 14:31:24,971 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 136 transitions. Word has length 15 [2021-05-03 14:31:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:24,971 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 136 transitions. [2021-05-03 14:31:24,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 136 transitions. [2021-05-03 14:31:24,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:24,971 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:24,971 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:25,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 14:31:25,187 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:25,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:25,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1029488178, now seen corresponding path program 19 times [2021-05-03 14:31:25,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:25,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101173336] [2021-05-03 14:31:25,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:25,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101173336] [2021-05-03 14:31:25,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564628786] [2021-05-03 14:31:25,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:25,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:25,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:25,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:25,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:31:25,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:25,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:25,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:25,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:31:25,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:25,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:25,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:25,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:25,431 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:25,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:25,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:31:25,435 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:25,478 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:31:25,478 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:25,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:25,480 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:31:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:25,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:25,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:25,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164702368] [2021-05-03 14:31:25,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:25,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:25,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:25,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:25,512 INFO L87 Difference]: Start difference. First operand 65 states and 136 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:25,600 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2021-05-03 14:31:25,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:25,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:25,602 INFO L225 Difference]: With dead ends: 107 [2021-05-03 14:31:25,602 INFO L226 Difference]: Without dead ends: 107 [2021-05-03 14:31:25,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-03 14:31:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2021-05-03 14:31:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.169230769230769) internal successors, (141), 65 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:25,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 141 transitions. [2021-05-03 14:31:25,608 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 141 transitions. Word has length 15 [2021-05-03 14:31:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:25,608 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 141 transitions. [2021-05-03 14:31:25,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 141 transitions. [2021-05-03 14:31:25,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:25,610 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:25,610 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:25,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:25,825 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:25,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:25,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1032427124, now seen corresponding path program 20 times [2021-05-03 14:31:25,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:25,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302206160] [2021-05-03 14:31:25,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:25,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302206160] [2021-05-03 14:31:25,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016073904] [2021-05-03 14:31:25,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:25,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:25,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:25,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:25,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:26,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:26,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:26,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105396499] [2021-05-03 14:31:26,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:26,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:26,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:26,055 INFO L87 Difference]: Start difference. First operand 66 states and 141 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:26,218 INFO L93 Difference]: Finished difference Result 75 states and 154 transitions. [2021-05-03 14:31:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:26,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:26,220 INFO L225 Difference]: With dead ends: 75 [2021-05-03 14:31:26,220 INFO L226 Difference]: Without dead ends: 71 [2021-05-03 14:31:26,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 205.5ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:31:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-03 14:31:26,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2021-05-03 14:31:26,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1538461538461537) internal successors, (140), 65 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 140 transitions. [2021-05-03 14:31:26,223 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 140 transitions. Word has length 15 [2021-05-03 14:31:26,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:26,223 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 140 transitions. [2021-05-03 14:31:26,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:26,224 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 140 transitions. [2021-05-03 14:31:26,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:26,224 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:26,224 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:26,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-03 14:31:26,429 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1119308358, now seen corresponding path program 21 times [2021-05-03 14:31:26,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:26,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029001129] [2021-05-03 14:31:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:26,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029001129] [2021-05-03 14:31:26,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210641142] [2021-05-03 14:31:26,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:31:26,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:31:26,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:26,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:26,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:26,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:26,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:26,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:26,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:26,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:26,641 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:26,675 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:31:26,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:26,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:31:26,681 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:26,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:26,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:26,692 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:31:26,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:26,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:26,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:31:26,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643812921] [2021-05-03 14:31:26,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:31:26,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:26,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:31:26,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:26,716 INFO L87 Difference]: Start difference. First operand 66 states and 140 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:26,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:26,795 INFO L93 Difference]: Finished difference Result 78 states and 160 transitions. [2021-05-03 14:31:26,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:26,795 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:26,796 INFO L225 Difference]: With dead ends: 78 [2021-05-03 14:31:26,796 INFO L226 Difference]: Without dead ends: 78 [2021-05-03 14:31:26,797 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-03 14:31:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2021-05-03 14:31:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:26,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 136 transitions. [2021-05-03 14:31:26,803 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 136 transitions. Word has length 15 [2021-05-03 14:31:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:26,803 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 136 transitions. [2021-05-03 14:31:26,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 136 transitions. [2021-05-03 14:31:26,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:26,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:26,803 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:27,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 14:31:27,017 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:27,017 INFO L82 PathProgramCache]: Analyzing trace with hash -962778214, now seen corresponding path program 22 times [2021-05-03 14:31:27,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:27,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795033785] [2021-05-03 14:31:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:27,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795033785] [2021-05-03 14:31:27,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604498600] [2021-05-03 14:31:27,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:27,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:27,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:27,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:27,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:27,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:31:27,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:27,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:31:27,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:27,261 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:31:27,261 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:27,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:27,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:31:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:27,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:27,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:27,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326389386] [2021-05-03 14:31:27,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:27,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:27,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:27,270 INFO L87 Difference]: Start difference. First operand 65 states and 136 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:27,336 INFO L93 Difference]: Finished difference Result 73 states and 152 transitions. [2021-05-03 14:31:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:27,338 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:27,338 INFO L225 Difference]: With dead ends: 73 [2021-05-03 14:31:27,338 INFO L226 Difference]: Without dead ends: 73 [2021-05-03 14:31:27,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-05-03 14:31:27,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2021-05-03 14:31:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 136 transitions. [2021-05-03 14:31:27,343 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 136 transitions. Word has length 15 [2021-05-03 14:31:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:27,343 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 136 transitions. [2021-05-03 14:31:27,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 136 transitions. [2021-05-03 14:31:27,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:27,343 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:27,343 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:27,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:27,569 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:27,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:27,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1322694732, now seen corresponding path program 23 times [2021-05-03 14:31:27,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:27,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372953010] [2021-05-03 14:31:27,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:27,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372953010] [2021-05-03 14:31:27,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074182740] [2021-05-03 14:31:27,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:27,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:31:27,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:27,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:27,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:27,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:27,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:27,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:31:27,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:27,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:31:27,833 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:27,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:27,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:31:27,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:27,884 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:31:27,885 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:27,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:27,887 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:31:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:27,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:27,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:27,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205870490] [2021-05-03 14:31:27,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:27,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:27,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:27,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:27,923 INFO L87 Difference]: Start difference. First operand 65 states and 136 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:28,024 INFO L93 Difference]: Finished difference Result 82 states and 171 transitions. [2021-05-03 14:31:28,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:28,025 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:28,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:28,025 INFO L225 Difference]: With dead ends: 82 [2021-05-03 14:31:28,025 INFO L226 Difference]: Without dead ends: 82 [2021-05-03 14:31:28,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:28,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-03 14:31:28,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2021-05-03 14:31:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.125) internal successors, (136), 64 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 136 transitions. [2021-05-03 14:31:28,030 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 136 transitions. Word has length 15 [2021-05-03 14:31:28,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:28,030 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 136 transitions. [2021-05-03 14:31:28,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:28,030 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 136 transitions. [2021-05-03 14:31:28,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:28,031 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:28,031 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:28,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-03 14:31:28,245 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:28,246 INFO L82 PathProgramCache]: Analyzing trace with hash -612646962, now seen corresponding path program 24 times [2021-05-03 14:31:28,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:28,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337977437] [2021-05-03 14:31:28,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:28,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337977437] [2021-05-03 14:31:28,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596051183] [2021-05-03 14:31:28,360 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:28,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:31:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:28,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:28,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:28,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:28,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:28,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160589349] [2021-05-03 14:31:28,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:28,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:28,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:28,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:28,503 INFO L87 Difference]: Start difference. First operand 65 states and 136 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:28,623 INFO L93 Difference]: Finished difference Result 68 states and 142 transitions. [2021-05-03 14:31:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:28,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:28,624 INFO L225 Difference]: With dead ends: 68 [2021-05-03 14:31:28,624 INFO L226 Difference]: Without dead ends: 68 [2021-05-03 14:31:28,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:28,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-03 14:31:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-05-03 14:31:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.129032258064516) internal successors, (132), 62 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:28,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 132 transitions. [2021-05-03 14:31:28,627 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 132 transitions. Word has length 15 [2021-05-03 14:31:28,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:28,627 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 132 transitions. [2021-05-03 14:31:28,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 132 transitions. [2021-05-03 14:31:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:28,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:28,628 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:28,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:28,841 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:28,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:28,841 INFO L82 PathProgramCache]: Analyzing trace with hash 865488444, now seen corresponding path program 25 times [2021-05-03 14:31:28,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:28,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416404504] [2021-05-03 14:31:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:28,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416404504] [2021-05-03 14:31:28,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919126124] [2021-05-03 14:31:28,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:31:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:28,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:28,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:29,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:29,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:29,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:31:29,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:29,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:29,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:29,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:29,142 INFO L628 ElimStorePlain]: treesize reduction 84, result has 35.9 percent of original size [2021-05-03 14:31:29,142 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:29,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:31:29,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:29,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:29,176 INFO L518 ElimStorePlain]: Eliminatee v_prenex_26 vanished before elimination [2021-05-03 14:31:29,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:29,178 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:31:29,260 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:29,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:29,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:31:29,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146639327] [2021-05-03 14:31:29,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:31:29,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:29,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:31:29,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:29,261 INFO L87 Difference]: Start difference. First operand 63 states and 132 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:29,335 INFO L93 Difference]: Finished difference Result 85 states and 164 transitions. [2021-05-03 14:31:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:29,336 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:29,336 INFO L225 Difference]: With dead ends: 85 [2021-05-03 14:31:29,336 INFO L226 Difference]: Without dead ends: 85 [2021-05-03 14:31:29,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:29,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-03 14:31:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 61. [2021-05-03 14:31:29,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:29,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2021-05-03 14:31:29,339 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2021-05-03 14:31:29,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:29,339 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2021-05-03 14:31:29,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:29,339 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2021-05-03 14:31:29,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:29,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:29,341 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:29,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-03 14:31:29,555 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:29,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:29,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1575536214, now seen corresponding path program 26 times [2021-05-03 14:31:29,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:29,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477934242] [2021-05-03 14:31:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:29,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477934242] [2021-05-03 14:31:29,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172884540] [2021-05-03 14:31:29,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:31:29,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:29,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:29,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:29,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:29,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:29,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:31:29,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:29,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:29,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:31:29,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:29,846 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-05-03 14:31:29,846 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:29,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:29,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:29,851 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:29,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:29,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:29,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-03 14:31:29,877 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:29,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:29,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:29,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:31:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:29,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:29,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:31:29,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004868472] [2021-05-03 14:31:29,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:31:29,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:29,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:31:29,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:29,941 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:30,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:30,035 INFO L93 Difference]: Finished difference Result 101 states and 193 transitions. [2021-05-03 14:31:30,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:31:30,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:30,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:30,036 INFO L225 Difference]: With dead ends: 101 [2021-05-03 14:31:30,036 INFO L226 Difference]: Without dead ends: 101 [2021-05-03 14:31:30,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-03 14:31:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 62. [2021-05-03 14:31:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.1147540983606556) internal successors, (129), 61 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 129 transitions. [2021-05-03 14:31:30,041 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 129 transitions. Word has length 15 [2021-05-03 14:31:30,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:30,042 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 129 transitions. [2021-05-03 14:31:30,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 129 transitions. [2021-05-03 14:31:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:30,042 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:30,042 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:30,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:30,277 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:30,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:30,277 INFO L82 PathProgramCache]: Analyzing trace with hash -657515780, now seen corresponding path program 27 times [2021-05-03 14:31:30,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:30,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287416974] [2021-05-03 14:31:30,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:30,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287416974] [2021-05-03 14:31:30,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044462394] [2021-05-03 14:31:30,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:30,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:31:30,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:30,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:30,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:30,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:30,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:30,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680159406] [2021-05-03 14:31:30,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:30,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:30,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:30,534 INFO L87 Difference]: Start difference. First operand 62 states and 129 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:30,746 INFO L93 Difference]: Finished difference Result 66 states and 133 transitions. [2021-05-03 14:31:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:30,747 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:30,747 INFO L225 Difference]: With dead ends: 66 [2021-05-03 14:31:30,747 INFO L226 Difference]: Without dead ends: 62 [2021-05-03 14:31:30,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:31:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-03 14:31:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-03 14:31:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 128 transitions. [2021-05-03 14:31:30,750 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 128 transitions. Word has length 15 [2021-05-03 14:31:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:30,750 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 128 transitions. [2021-05-03 14:31:30,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 128 transitions. [2021-05-03 14:31:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:30,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:30,751 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:30,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-03 14:31:30,965 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:30,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:30,965 INFO L82 PathProgramCache]: Analyzing trace with hash -570634546, now seen corresponding path program 28 times [2021-05-03 14:31:30,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:30,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960793474] [2021-05-03 14:31:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:31,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960793474] [2021-05-03 14:31:31,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184248156] [2021-05-03 14:31:31,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:31:31,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:31,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:31,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:31,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:31,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:31,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:31,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:31,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:31,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:31,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:31,222 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:31:31,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:31,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:31:31,228 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:31,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:31,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:31,238 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:31:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:31,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:31,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:31:31,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17615307] [2021-05-03 14:31:31,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:31:31,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:31,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:31:31,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:31,265 INFO L87 Difference]: Start difference. First operand 62 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:31,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:31,332 INFO L93 Difference]: Finished difference Result 69 states and 139 transitions. [2021-05-03 14:31:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:31,333 INFO L225 Difference]: With dead ends: 69 [2021-05-03 14:31:31,333 INFO L226 Difference]: Without dead ends: 69 [2021-05-03 14:31:31,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:31,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-03 14:31:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-05-03 14:31:31,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-05-03 14:31:31,335 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 15 [2021-05-03 14:31:31,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:31,337 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-05-03 14:31:31,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-05-03 14:31:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:31,338 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:31,338 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:31,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:31,553 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:31,553 INFO L82 PathProgramCache]: Analyzing trace with hash 246838794, now seen corresponding path program 29 times [2021-05-03 14:31:31,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:31,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373257472] [2021-05-03 14:31:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:31,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373257472] [2021-05-03 14:31:31,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681533622] [2021-05-03 14:31:31,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:31,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:31:31,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:31,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:31,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:31,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775719756] [2021-05-03 14:31:31,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:31,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:31,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:31,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:31,853 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:32,072 INFO L93 Difference]: Finished difference Result 114 states and 213 transitions. [2021-05-03 14:31:32,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:31:32,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:32,074 INFO L225 Difference]: With dead ends: 114 [2021-05-03 14:31:32,074 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 14:31:32,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:31:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 14:31:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 60. [2021-05-03 14:31:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.1016949152542375) internal successors, (124), 59 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 124 transitions. [2021-05-03 14:31:32,077 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 124 transitions. Word has length 15 [2021-05-03 14:31:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:32,077 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 124 transitions. [2021-05-03 14:31:32,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 124 transitions. [2021-05-03 14:31:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:32,077 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:32,078 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:32,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:32,285 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:32,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1986213200, now seen corresponding path program 30 times [2021-05-03 14:31:32,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:32,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928570516] [2021-05-03 14:31:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:32,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:32,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928570516] [2021-05-03 14:31:32,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765371087] [2021-05-03 14:31:32,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:32,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:31:32,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:32,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:32,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:32,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746925582] [2021-05-03 14:31:32,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:32,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:32,556 INFO L87 Difference]: Start difference. First operand 60 states and 124 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:32,687 INFO L93 Difference]: Finished difference Result 85 states and 164 transitions. [2021-05-03 14:31:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:32,688 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:32,689 INFO L225 Difference]: With dead ends: 85 [2021-05-03 14:31:32,689 INFO L226 Difference]: Without dead ends: 81 [2021-05-03 14:31:32,689 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 196.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:31:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-03 14:31:32,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-05-03 14:31:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2021-05-03 14:31:32,691 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2021-05-03 14:31:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:32,691 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2021-05-03 14:31:32,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2021-05-03 14:31:32,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:32,692 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:32,692 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:32,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:32,893 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:32,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:32,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1899331966, now seen corresponding path program 31 times [2021-05-03 14:31:32,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:32,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680002517] [2021-05-03 14:31:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:32,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:32,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680002517] [2021-05-03 14:31:32,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89418449] [2021-05-03 14:31:32,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:33,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:33,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:33,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:33,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:33,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:33,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:33,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:33,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:31:33,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:33,179 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:31:33,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:33,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:31:33,185 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:33,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:33,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:33,196 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:31:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:33,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:33,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:31:33,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423485533] [2021-05-03 14:31:33,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:31:33,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:33,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:31:33,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:33,222 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:33,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:33,409 INFO L93 Difference]: Finished difference Result 95 states and 186 transitions. [2021-05-03 14:31:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:31:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:33,410 INFO L225 Difference]: With dead ends: 95 [2021-05-03 14:31:33,411 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 14:31:33,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:31:33,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 14:31:33,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2021-05-03 14:31:33,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:33,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2021-05-03 14:31:33,414 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2021-05-03 14:31:33,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:33,414 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2021-05-03 14:31:33,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:33,414 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2021-05-03 14:31:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:33,414 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:33,414 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:33,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-03 14:31:33,625 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:33,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:33,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1398467878, now seen corresponding path program 32 times [2021-05-03 14:31:33,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:33,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104507940] [2021-05-03 14:31:33,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:33,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104507940] [2021-05-03 14:31:33,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556931439] [2021-05-03 14:31:33,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:33,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:33,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:33,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:31:33,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:33,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:33,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-05-03 14:31:33,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769255890] [2021-05-03 14:31:33,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:31:33,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:33,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:31:33,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:31:33,793 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:34,132 INFO L93 Difference]: Finished difference Result 83 states and 160 transitions. [2021-05-03 14:31:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:34,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:34,134 INFO L225 Difference]: With dead ends: 83 [2021-05-03 14:31:34,134 INFO L226 Difference]: Without dead ends: 77 [2021-05-03 14:31:34,134 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:31:34,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-03 14:31:34,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 58. [2021-05-03 14:31:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 119 transitions. [2021-05-03 14:31:34,136 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 119 transitions. Word has length 15 [2021-05-03 14:31:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:34,137 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 119 transitions. [2021-05-03 14:31:34,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:34,137 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 119 transitions. [2021-05-03 14:31:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:31:34,137 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:34,137 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:34,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-05-03 14:31:34,345 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:34,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1382942798, now seen corresponding path program 33 times [2021-05-03 14:31:34,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:34,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465062463] [2021-05-03 14:31:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465062463] [2021-05-03 14:31:34,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255255080] [2021-05-03 14:31:34,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:34,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:31:34,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:34,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:31:34,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:34,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-05-03 14:31:34,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:34,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-05-03 14:31:34,545 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:34,568 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-05-03 14:31:34,568 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:31:34,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:34,569 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-05-03 14:31:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:34,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:34,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-05-03 14:31:34,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162642949] [2021-05-03 14:31:34,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:31:34,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:34,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:31:34,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:31:34,597 INFO L87 Difference]: Start difference. First operand 58 states and 119 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:34,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:34,710 INFO L93 Difference]: Finished difference Result 87 states and 169 transitions. [2021-05-03 14:31:34,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:31:34,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:31:34,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:34,711 INFO L225 Difference]: With dead ends: 87 [2021-05-03 14:31:34,711 INFO L226 Difference]: Without dead ends: 87 [2021-05-03 14:31:34,711 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:31:34,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-03 14:31:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 56. [2021-05-03 14:31:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.036363636363636) internal successors, (112), 55 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 112 transitions. [2021-05-03 14:31:34,714 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 112 transitions. Word has length 15 [2021-05-03 14:31:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:34,714 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 112 transitions. [2021-05-03 14:31:34,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 112 transitions. [2021-05-03 14:31:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:34,715 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:34,715 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:34,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:34,916 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:34,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:34,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1355148170, now seen corresponding path program 34 times [2021-05-03 14:31:34,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:34,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200161475] [2021-05-03 14:31:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200161475] [2021-05-03 14:31:35,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215769438] [2021-05-03 14:31:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:35,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:35,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:35,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:35,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:35,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:35,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:35,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:35,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:35,328 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:35,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:35,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:35,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 14:31:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:35,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:35,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:31:35,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727479641] [2021-05-03 14:31:35,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:31:35,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:35,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:31:35,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:35,394 INFO L87 Difference]: Start difference. First operand 56 states and 112 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:35,723 INFO L93 Difference]: Finished difference Result 106 states and 201 transitions. [2021-05-03 14:31:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:35,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:35,725 INFO L225 Difference]: With dead ends: 106 [2021-05-03 14:31:35,725 INFO L226 Difference]: Without dead ends: 99 [2021-05-03 14:31:35,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 463.7ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:31:35,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-03 14:31:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 66. [2021-05-03 14:31:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 131 transitions. [2021-05-03 14:31:35,728 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 131 transitions. Word has length 16 [2021-05-03 14:31:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:35,728 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 131 transitions. [2021-05-03 14:31:35,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 131 transitions. [2021-05-03 14:31:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:35,729 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:35,729 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:35,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:35,937 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:35,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:35,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1913206166, now seen corresponding path program 35 times [2021-05-03 14:31:35,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:35,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297909287] [2021-05-03 14:31:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:36,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297909287] [2021-05-03 14:31:36,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458670472] [2021-05-03 14:31:36,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:36,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:36,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:36,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:36,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:36,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:36,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:36,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:36,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:36,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:36,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:36,319 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:36,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:36,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:36,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-05-03 14:31:36,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:36,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:36,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 14:31:36,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4836607] [2021-05-03 14:31:36,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:31:36,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:31:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:31:36,378 INFO L87 Difference]: Start difference. First operand 66 states and 131 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:36,925 INFO L93 Difference]: Finished difference Result 136 states and 259 transitions. [2021-05-03 14:31:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:31:36,926 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:36,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:36,927 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:31:36,927 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:31:36,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 558.4ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:31:36,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:31:36,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 69. [2021-05-03 14:31:36,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:36,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 140 transitions. [2021-05-03 14:31:36,930 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 140 transitions. Word has length 16 [2021-05-03 14:31:36,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:36,930 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 140 transitions. [2021-05-03 14:31:36,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:36,930 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 140 transitions. [2021-05-03 14:31:36,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:36,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:36,931 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:37,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-03 14:31:37,132 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:37,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1938861990, now seen corresponding path program 36 times [2021-05-03 14:31:37,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:37,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384428815] [2021-05-03 14:31:37,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:37,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384428815] [2021-05-03 14:31:37,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524670803] [2021-05-03 14:31:37,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:37,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:31:37,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:37,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:37,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:37,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:37,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:37,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:37,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:37,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:37,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:37,563 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:37,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:37,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:37,574 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-05-03 14:31:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:37,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:37,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:31:37,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909696609] [2021-05-03 14:31:37,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:31:37,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:37,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:31:37,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:37,622 INFO L87 Difference]: Start difference. First operand 69 states and 140 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:37,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:37,853 INFO L93 Difference]: Finished difference Result 91 states and 177 transitions. [2021-05-03 14:31:37,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:37,854 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:37,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:37,855 INFO L225 Difference]: With dead ends: 91 [2021-05-03 14:31:37,855 INFO L226 Difference]: Without dead ends: 84 [2021-05-03 14:31:37,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:37,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-03 14:31:37,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-05-03 14:31:37,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 70 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 145 transitions. [2021-05-03 14:31:37,858 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 145 transitions. Word has length 16 [2021-05-03 14:31:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:37,858 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 145 transitions. [2021-05-03 14:31:37,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:37,858 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 145 transitions. [2021-05-03 14:31:37,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:37,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:37,859 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:38,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-05-03 14:31:38,069 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:38,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1494100242, now seen corresponding path program 37 times [2021-05-03 14:31:38,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:38,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710618087] [2021-05-03 14:31:38,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:38,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710618087] [2021-05-03 14:31:38,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440291047] [2021-05-03 14:31:38,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:31:38,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:38,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:38,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:38,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:38,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:38,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:38,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:38,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:38,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:38,571 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:38,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:38,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:38,582 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-05-03 14:31:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:38,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:38,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:31:38,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066562822] [2021-05-03 14:31:38,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:31:38,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:38,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:31:38,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:38,641 INFO L87 Difference]: Start difference. First operand 71 states and 145 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:38,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:38,968 INFO L93 Difference]: Finished difference Result 101 states and 199 transitions. [2021-05-03 14:31:38,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:38,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:38,969 INFO L225 Difference]: With dead ends: 101 [2021-05-03 14:31:38,969 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:31:38,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 450.5ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:31:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:31:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-05-03 14:31:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-05-03 14:31:38,972 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-05-03 14:31:38,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:38,973 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-05-03 14:31:38,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:38,973 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-05-03 14:31:38,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:38,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:38,973 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:39,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:39,181 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash -357914970, now seen corresponding path program 38 times [2021-05-03 14:31:39,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:39,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115192879] [2021-05-03 14:31:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:39,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115192879] [2021-05-03 14:31:39,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335422489] [2021-05-03 14:31:39,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:39,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:39,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:39,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:39,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:39,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:39,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:39,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:39,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:39,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:39,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:39,693 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:39,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:39,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:39,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:39,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:39,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:39,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:39,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:39,779 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:39,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:39,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:39,805 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:39,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:39,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:31:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087195602] [2021-05-03 14:31:39,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:31:39,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:39,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:31:39,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:39,895 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:40,489 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2021-05-03 14:31:40,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:40,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:40,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:40,490 INFO L225 Difference]: With dead ends: 120 [2021-05-03 14:31:40,490 INFO L226 Difference]: Without dead ends: 104 [2021-05-03 14:31:40,490 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 702.1ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:31:40,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-03 14:31:40,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2021-05-03 14:31:40,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 155 transitions. [2021-05-03 14:31:40,493 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 155 transitions. Word has length 16 [2021-05-03 14:31:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:40,493 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 155 transitions. [2021-05-03 14:31:40,493 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 155 transitions. [2021-05-03 14:31:40,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:40,493 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:40,493 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:40,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-03 14:31:40,694 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:40,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:40,695 INFO L82 PathProgramCache]: Analyzing trace with hash 694082934, now seen corresponding path program 39 times [2021-05-03 14:31:40,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:40,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349775991] [2021-05-03 14:31:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:40,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349775991] [2021-05-03 14:31:40,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516402767] [2021-05-03 14:31:40,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:40,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:31:40,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:41,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:41,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:41,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:41,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:41,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:41,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:41,143 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:41,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:41,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:41,154 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 14:31:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:41,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:41,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:31:41,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614256153] [2021-05-03 14:31:41,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:31:41,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:41,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:31:41,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:41,202 INFO L87 Difference]: Start difference. First operand 74 states and 155 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:41,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:41,532 INFO L93 Difference]: Finished difference Result 95 states and 191 transitions. [2021-05-03 14:31:41,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:41,532 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:41,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:41,533 INFO L225 Difference]: With dead ends: 95 [2021-05-03 14:31:41,533 INFO L226 Difference]: Without dead ends: 88 [2021-05-03 14:31:41,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:31:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-03 14:31:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-05-03 14:31:41,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:41,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 164 transitions. [2021-05-03 14:31:41,536 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 164 transitions. Word has length 16 [2021-05-03 14:31:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:41,536 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 164 transitions. [2021-05-03 14:31:41,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 164 transitions. [2021-05-03 14:31:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:41,537 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:41,537 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:41,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:41,745 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:41,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:41,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1830268206, now seen corresponding path program 40 times [2021-05-03 14:31:41,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:41,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052748203] [2021-05-03 14:31:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:42,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052748203] [2021-05-03 14:31:42,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006093461] [2021-05-03 14:31:42,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:42,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:42,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:42,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:42,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:42,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:42,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:42,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:42,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:42,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:42,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:42,182 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:42,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:42,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:42,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:42,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:42,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:42,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:42,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:42,266 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:42,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:42,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:42,301 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:42,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:42,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 14:31:42,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088465643] [2021-05-03 14:31:42,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:31:42,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:42,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:31:42,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:31:42,413 INFO L87 Difference]: Start difference. First operand 78 states and 164 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:42,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:42,955 INFO L93 Difference]: Finished difference Result 105 states and 214 transitions. [2021-05-03 14:31:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:31:42,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:42,956 INFO L225 Difference]: With dead ends: 105 [2021-05-03 14:31:42,956 INFO L226 Difference]: Without dead ends: 96 [2021-05-03 14:31:42,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-03 14:31:42,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2021-05-03 14:31:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2021-05-03 14:31:42,960 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2021-05-03 14:31:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:42,960 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2021-05-03 14:31:42,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:42,961 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2021-05-03 14:31:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:42,961 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:42,961 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:43,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:43,177 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:43,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:43,177 INFO L82 PathProgramCache]: Analyzing trace with hash -315902554, now seen corresponding path program 41 times [2021-05-03 14:31:43,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:43,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329387824] [2021-05-03 14:31:43,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:43,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329387824] [2021-05-03 14:31:43,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924916129] [2021-05-03 14:31:43,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:43,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:31:43,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:43,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:43,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:43,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:43,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:43,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:43,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:43,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:43,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:43,444 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:43,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:43,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:43,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:43,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:43,482 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:43,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:43,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:43,489 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:43,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:43,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:43,526 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:43,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:43,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:31:43,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33092216] [2021-05-03 14:31:43,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:31:43,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:43,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:31:43,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:43,634 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:43,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:43,982 INFO L93 Difference]: Finished difference Result 108 states and 215 transitions. [2021-05-03 14:31:43,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:31:43,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:43,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:43,983 INFO L225 Difference]: With dead ends: 108 [2021-05-03 14:31:43,983 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:31:43,984 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 377.3ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:31:43,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:31:43,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2021-05-03 14:31:43,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 164 transitions. [2021-05-03 14:31:43,987 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 164 transitions. Word has length 16 [2021-05-03 14:31:43,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:43,988 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 164 transitions. [2021-05-03 14:31:43,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:43,988 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 164 transitions. [2021-05-03 14:31:43,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:43,988 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:43,988 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:44,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:44,201 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:44,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:44,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1093890538, now seen corresponding path program 42 times [2021-05-03 14:31:44,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:44,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640334249] [2021-05-03 14:31:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:44,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:44,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640334249] [2021-05-03 14:31:44,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435791024] [2021-05-03 14:31:44,453 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:31:44,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:31:44,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:44,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:44,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:44,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:44,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:44,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:44,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:44,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:44,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:44,723 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:44,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:44,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:44,733 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 14:31:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:44,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:44,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:44,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590384918] [2021-05-03 14:31:44,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:44,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:44,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:44,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:44,785 INFO L87 Difference]: Start difference. First operand 78 states and 164 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:44,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:44,970 INFO L93 Difference]: Finished difference Result 97 states and 196 transitions. [2021-05-03 14:31:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:44,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:44,971 INFO L225 Difference]: With dead ends: 97 [2021-05-03 14:31:44,971 INFO L226 Difference]: Without dead ends: 90 [2021-05-03 14:31:44,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 442.3ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:31:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-03 14:31:44,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2021-05-03 14:31:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:44,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-05-03 14:31:44,974 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-05-03 14:31:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:44,974 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-05-03 14:31:44,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-05-03 14:31:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:44,975 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:44,975 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:45,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:45,185 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:45,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1955895602, now seen corresponding path program 43 times [2021-05-03 14:31:45,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:45,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071448439] [2021-05-03 14:31:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:45,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071448439] [2021-05-03 14:31:45,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279297352] [2021-05-03 14:31:45,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:45,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:45,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:45,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:45,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:45,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:45,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:31:45,659 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:45,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:45,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:45,670 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 14:31:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:45,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:45,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:45,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093458568] [2021-05-03 14:31:45,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:45,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:45,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:45,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:45,723 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:46,079 INFO L93 Difference]: Finished difference Result 107 states and 218 transitions. [2021-05-03 14:31:46,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:46,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:46,080 INFO L225 Difference]: With dead ends: 107 [2021-05-03 14:31:46,081 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 14:31:46,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:31:46,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 14:31:46,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-05-03 14:31:46,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:46,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-05-03 14:31:46,084 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-05-03 14:31:46,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:46,084 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-05-03 14:31:46,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:46,084 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-05-03 14:31:46,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:46,085 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:46,085 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:46,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-03 14:31:46,286 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:46,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:46,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1202886422, now seen corresponding path program 44 times [2021-05-03 14:31:46,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:46,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831205658] [2021-05-03 14:31:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:46,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831205658] [2021-05-03 14:31:46,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247957323] [2021-05-03 14:31:46,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:46,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:46,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:46,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:46,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:46,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:46,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:46,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:46,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:46,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:46,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:46,750 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:46,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:46,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:46,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:46,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:46,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:46,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:46,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:46,824 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:46,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:46,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:46,859 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:46,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:46,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:46,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504050898] [2021-05-03 14:31:46,944 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:46,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:46,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:46,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:46,945 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:47,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:47,217 INFO L93 Difference]: Finished difference Result 105 states and 215 transitions. [2021-05-03 14:31:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:31:47,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:47,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:47,218 INFO L225 Difference]: With dead ends: 105 [2021-05-03 14:31:47,218 INFO L226 Difference]: Without dead ends: 98 [2021-05-03 14:31:47,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:31:47,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-03 14:31:47,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-05-03 14:31:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-05-03 14:31:47,221 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-05-03 14:31:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:47,221 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-05-03 14:31:47,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-05-03 14:31:47,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:47,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:47,222 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:47,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-03 14:31:47,437 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:47,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:47,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1036686798, now seen corresponding path program 45 times [2021-05-03 14:31:47,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:47,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721149677] [2021-05-03 14:31:47,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:47,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721149677] [2021-05-03 14:31:47,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663864093] [2021-05-03 14:31:47,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:47,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:31:47,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:47,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:47,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:47,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:47,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:47,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:47,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:47,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:47,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:47,849 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:47,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:47,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:47,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-05-03 14:31:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:47,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:47,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:31:47,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214912364] [2021-05-03 14:31:47,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:31:47,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:47,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:31:47,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:47,898 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:48,211 INFO L93 Difference]: Finished difference Result 101 states and 210 transitions. [2021-05-03 14:31:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:31:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:48,212 INFO L225 Difference]: With dead ends: 101 [2021-05-03 14:31:48,212 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:31:48,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 362.9ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:31:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:31:48,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 83. [2021-05-03 14:31:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.158536585365854) internal successors, (177), 82 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 177 transitions. [2021-05-03 14:31:48,215 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 177 transitions. Word has length 16 [2021-05-03 14:31:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:48,215 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 177 transitions. [2021-05-03 14:31:48,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 177 transitions. [2021-05-03 14:31:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:48,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:48,216 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:48,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-05-03 14:31:48,429 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:48,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:48,429 INFO L82 PathProgramCache]: Analyzing trace with hash 99498474, now seen corresponding path program 46 times [2021-05-03 14:31:48,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:48,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297907854] [2021-05-03 14:31:48,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:48,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297907854] [2021-05-03 14:31:48,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759638283] [2021-05-03 14:31:48,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:48,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:48,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:48,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:48,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:48,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:48,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:48,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:48,827 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:48,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:48,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:48,833 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:48,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:48,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:48,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:48,866 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:48,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:48,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:48,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:48,898 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:48,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:48,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:48,922 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:49,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:49,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:49,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506928648] [2021-05-03 14:31:49,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:49,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:49,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:49,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:49,019 INFO L87 Difference]: Start difference. First operand 83 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:49,459 INFO L93 Difference]: Finished difference Result 127 states and 250 transitions. [2021-05-03 14:31:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:31:49,460 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:49,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:49,461 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:31:49,461 INFO L226 Difference]: Without dead ends: 111 [2021-05-03 14:31:49,461 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:31:49,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-03 14:31:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2021-05-03 14:31:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2021-05-03 14:31:49,464 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 16 [2021-05-03 14:31:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:49,465 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2021-05-03 14:31:49,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:49,465 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2021-05-03 14:31:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:49,465 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:49,465 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:49,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-05-03 14:31:49,681 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:49,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:49,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2046672286, now seen corresponding path program 47 times [2021-05-03 14:31:49,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:49,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821971149] [2021-05-03 14:31:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:49,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:49,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821971149] [2021-05-03 14:31:49,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893362478] [2021-05-03 14:31:49,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:49,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:31:49,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:49,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:49,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:49,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:49,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:49,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:49,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:49,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:49,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:49,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:50,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:50,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:50,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:50,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:50,028 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:50,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:50,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:50,035 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:50,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:50,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:50,062 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:50,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:50,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:50,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:31:50,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192729049] [2021-05-03 14:31:50,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:31:50,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:50,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:31:50,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:31:50,158 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:50,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:50,429 INFO L93 Difference]: Finished difference Result 109 states and 221 transitions. [2021-05-03 14:31:50,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:50,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:50,430 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:31:50,430 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 14:31:50,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:31:50,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 14:31:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-05-03 14:31:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.1481481481481484) internal successors, (174), 81 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 174 transitions. [2021-05-03 14:31:50,433 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 174 transitions. Word has length 16 [2021-05-03 14:31:50,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:50,433 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 174 transitions. [2021-05-03 14:31:50,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:50,434 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 174 transitions. [2021-05-03 14:31:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:50,434 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:50,434 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:50,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:50,641 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:50,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:50,641 INFO L82 PathProgramCache]: Analyzing trace with hash 141510890, now seen corresponding path program 48 times [2021-05-03 14:31:50,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:50,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731812240] [2021-05-03 14:31:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:50,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:50,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731812240] [2021-05-03 14:31:50,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690278249] [2021-05-03 14:31:50,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:50,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:31:50,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:50,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:50,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:51,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:51,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:51,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:51,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:51,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:51,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:51,109 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:51,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:51,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:51,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:51,116 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:51,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:51,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:51,122 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:51,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:51,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:51,149 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:51,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:51,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:51,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135787092] [2021-05-03 14:31:51,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:51,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:51,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:51,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:51,275 INFO L87 Difference]: Start difference. First operand 82 states and 174 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:51,570 INFO L93 Difference]: Finished difference Result 112 states and 227 transitions. [2021-05-03 14:31:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:31:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:51,571 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:31:51,572 INFO L226 Difference]: Without dead ends: 98 [2021-05-03 14:31:51,572 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 549.4ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:31:51,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-03 14:31:51,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 85. [2021-05-03 14:31:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.142857142857143) internal successors, (180), 84 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:51,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2021-05-03 14:31:51,579 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 16 [2021-05-03 14:31:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:51,579 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2021-05-03 14:31:51,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2021-05-03 14:31:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:51,579 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:51,580 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:51,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-05-03 14:31:51,793 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:51,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:51,793 INFO L82 PathProgramCache]: Analyzing trace with hash 245268066, now seen corresponding path program 49 times [2021-05-03 14:31:51,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:51,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689798959] [2021-05-03 14:31:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:52,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:52,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689798959] [2021-05-03 14:31:52,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047389360] [2021-05-03 14:31:52,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:52,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:52,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:52,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:52,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:52,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:52,163 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:52,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:52,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:52,169 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:52,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:52,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:52,178 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:31:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:52,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:52,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:52,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286122810] [2021-05-03 14:31:52,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:52,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:52,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:52,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:52,233 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:52,408 INFO L93 Difference]: Finished difference Result 105 states and 214 transitions. [2021-05-03 14:31:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:31:52,408 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:52,409 INFO L225 Difference]: With dead ends: 105 [2021-05-03 14:31:52,409 INFO L226 Difference]: Without dead ends: 98 [2021-05-03 14:31:52,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 352.6ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:31:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-03 14:31:52,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2021-05-03 14:31:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.152941176470588) internal successors, (183), 85 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-05-03 14:31:52,412 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 16 [2021-05-03 14:31:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:52,412 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-05-03 14:31:52,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-05-03 14:31:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:52,412 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:52,412 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:52,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:52,625 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:52,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:52,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1107273130, now seen corresponding path program 50 times [2021-05-03 14:31:52,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:52,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045172565] [2021-05-03 14:31:52,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:52,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045172565] [2021-05-03 14:31:52,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122825432] [2021-05-03 14:31:52,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:31:52,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:52,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:52,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:52,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:53,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:53,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:53,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:53,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:53,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:53,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:31:53,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:53,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:53,112 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:53,112 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:31:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:53,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:53,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:53,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294296886] [2021-05-03 14:31:53,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:53,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:53,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:53,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:53,156 INFO L87 Difference]: Start difference. First operand 86 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:53,480 INFO L93 Difference]: Finished difference Result 115 states and 236 transitions. [2021-05-03 14:31:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:53,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:53,481 INFO L225 Difference]: With dead ends: 115 [2021-05-03 14:31:53,481 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 14:31:53,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 490.4ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:31:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 14:31:53,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 87. [2021-05-03 14:31:53,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1627906976744184) internal successors, (186), 86 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 186 transitions. [2021-05-03 14:31:53,484 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 186 transitions. Word has length 16 [2021-05-03 14:31:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:53,484 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 186 transitions. [2021-05-03 14:31:53,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 186 transitions. [2021-05-03 14:31:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:53,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:53,485 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:53,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:53,686 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2051508894, now seen corresponding path program 51 times [2021-05-03 14:31:53,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:53,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597714659] [2021-05-03 14:31:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:53,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:53,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597714659] [2021-05-03 14:31:53,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253425918] [2021-05-03 14:31:53,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:31:53,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:31:53,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:53,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:53,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:54,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:54,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:54,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:54,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:54,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:54,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:54,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:54,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:54,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:54,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:54,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:54,166 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:54,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:54,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:54,172 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:54,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:54,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:54,201 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:54,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:54,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:54,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452416293] [2021-05-03 14:31:54,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:54,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:54,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:54,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:54,293 INFO L87 Difference]: Start difference. First operand 87 states and 186 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:54,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:54,594 INFO L93 Difference]: Finished difference Result 113 states and 233 transitions. [2021-05-03 14:31:54,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:31:54,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:54,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:54,596 INFO L225 Difference]: With dead ends: 113 [2021-05-03 14:31:54,596 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 14:31:54,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:31:54,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 14:31:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-05-03 14:31:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.142857142857143) internal successors, (180), 84 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2021-05-03 14:31:54,599 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 16 [2021-05-03 14:31:54,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:54,599 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2021-05-03 14:31:54,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:54,599 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2021-05-03 14:31:54,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:54,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:54,600 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:54,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:54,817 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:54,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:54,818 INFO L82 PathProgramCache]: Analyzing trace with hash -999510990, now seen corresponding path program 52 times [2021-05-03 14:31:54,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:54,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697453959] [2021-05-03 14:31:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:54,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:55,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:55,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697453959] [2021-05-03 14:31:55,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849489820] [2021-05-03 14:31:55,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:55,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:31:55,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:55,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:55,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:55,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:55,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:55,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:55,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:55,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:55,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:31:55,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:55,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:55,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:55,193 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:31:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:55,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:55,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:55,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878009929] [2021-05-03 14:31:55,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:55,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:55,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:55,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:55,235 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:55,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:55,592 INFO L93 Difference]: Finished difference Result 106 states and 220 transitions. [2021-05-03 14:31:55,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:31:55,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:55,594 INFO L225 Difference]: With dead ends: 106 [2021-05-03 14:31:55,594 INFO L226 Difference]: Without dead ends: 99 [2021-05-03 14:31:55,594 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:31:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-03 14:31:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-05-03 14:31:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.1511627906976742) internal successors, (185), 86 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:55,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 185 transitions. [2021-05-03 14:31:55,596 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 185 transitions. Word has length 16 [2021-05-03 14:31:55,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:55,596 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 185 transitions. [2021-05-03 14:31:55,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:55,596 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 185 transitions. [2021-05-03 14:31:55,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:55,596 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:55,596 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:55,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-05-03 14:31:55,797 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:55,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:55,797 INFO L82 PathProgramCache]: Analyzing trace with hash 136674282, now seen corresponding path program 53 times [2021-05-03 14:31:55,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:55,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690275842] [2021-05-03 14:31:55,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:56,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690275842] [2021-05-03 14:31:56,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646184006] [2021-05-03 14:31:56,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:56,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:31:56,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:56,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:56,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:56,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:56,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:56,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:56,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:56,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:56,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:56,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:56,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:56,166 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:56,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:56,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:31:56,173 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:56,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:56,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:56,201 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:56,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:56,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:56,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738580521] [2021-05-03 14:31:56,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:56,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:56,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:56,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:56,338 INFO L87 Difference]: Start difference. First operand 87 states and 185 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:57,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:57,046 INFO L93 Difference]: Finished difference Result 157 states and 307 transitions. [2021-05-03 14:31:57,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:31:57,046 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:57,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:57,047 INFO L225 Difference]: With dead ends: 157 [2021-05-03 14:31:57,047 INFO L226 Difference]: Without dead ends: 133 [2021-05-03 14:31:57,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 751.0ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:31:57,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-03 14:31:57,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 89. [2021-05-03 14:31:57,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.1818181818181817) internal successors, (192), 88 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 192 transitions. [2021-05-03 14:31:57,049 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 192 transitions. Word has length 16 [2021-05-03 14:31:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:57,049 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 192 transitions. [2021-05-03 14:31:57,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 192 transitions. [2021-05-03 14:31:57,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:57,050 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:57,050 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:57,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-05-03 14:31:57,251 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:57,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:57,251 INFO L82 PathProgramCache]: Analyzing trace with hash -2009496478, now seen corresponding path program 54 times [2021-05-03 14:31:57,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:57,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122682229] [2021-05-03 14:31:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:57,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122682229] [2021-05-03 14:31:57,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254352165] [2021-05-03 14:31:57,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:57,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:31:57,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:57,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:57,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:57,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:57,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:57,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:57,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:57,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:57,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:31:57,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:57,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:57,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:57,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:57,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:57,579 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:57,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:57,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:57,587 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:57,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:57,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:31:57,614 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:31:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:57,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:57,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:57,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717100731] [2021-05-03 14:31:57,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:57,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:57,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:57,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:57,721 INFO L87 Difference]: Start difference. First operand 89 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:58,404 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-05-03 14:31:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:31:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:58,405 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:31:58,405 INFO L226 Difference]: Without dead ends: 133 [2021-05-03 14:31:58,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:31:58,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-03 14:31:58,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 92. [2021-05-03 14:31:58,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.21978021978022) internal successors, (202), 91 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:58,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 202 transitions. [2021-05-03 14:31:58,408 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 202 transitions. Word has length 16 [2021-05-03 14:31:58,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:58,408 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 202 transitions. [2021-05-03 14:31:58,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:58,409 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 202 transitions. [2021-05-03 14:31:58,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:58,409 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:58,409 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:58,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:58,625 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:58,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1885309270, now seen corresponding path program 55 times [2021-05-03 14:31:58,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:58,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056645589] [2021-05-03 14:31:58,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:58,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:58,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056645589] [2021-05-03 14:31:58,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716050677] [2021-05-03 14:31:58,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:58,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:58,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:31:59,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:59,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:31:59,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:31:59,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:59,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:31:59,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:31:59,019 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:31:59,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:31:59,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:31:59,029 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:31:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:59,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:31:59,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:31:59,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644962494] [2021-05-03 14:31:59,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:31:59,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:31:59,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:31:59,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:31:59,072 INFO L87 Difference]: Start difference. First operand 92 states and 202 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:59,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:31:59,400 INFO L93 Difference]: Finished difference Result 112 states and 240 transitions. [2021-05-03 14:31:59,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:31:59,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:31:59,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:31:59,401 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:31:59,401 INFO L226 Difference]: Without dead ends: 105 [2021-05-03 14:31:59,401 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 417.3ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:31:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-03 14:31:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2021-05-03 14:31:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.2282608695652173) internal successors, (205), 92 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 205 transitions. [2021-05-03 14:31:59,404 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 205 transitions. Word has length 16 [2021-05-03 14:31:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:31:59,404 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 205 transitions. [2021-05-03 14:31:59,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:31:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 205 transitions. [2021-05-03 14:31:59,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:31:59,405 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:31:59,405 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:31:59,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:59,629 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:31:59,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:31:59,629 INFO L82 PathProgramCache]: Analyzing trace with hash -749123998, now seen corresponding path program 56 times [2021-05-03 14:31:59,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:31:59,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324943168] [2021-05-03 14:31:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:31:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:31:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:31:59,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324943168] [2021-05-03 14:31:59,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947236905] [2021-05-03 14:31:59,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:31:59,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:31:59,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:31:59,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:31:59,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:00,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:00,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:00,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:00,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:00,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:00,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:00,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:00,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:00,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:00,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:00,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:32:00,134 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:00,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:00,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:32:00,141 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:00,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:00,187 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:00,188 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:32:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:00,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:00,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:32:00,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498126453] [2021-05-03 14:32:00,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:32:00,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:00,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:32:00,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:00,286 INFO L87 Difference]: Start difference. First operand 93 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:00,845 INFO L93 Difference]: Finished difference Result 137 states and 278 transitions. [2021-05-03 14:32:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:32:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:00,846 INFO L225 Difference]: With dead ends: 137 [2021-05-03 14:32:00,846 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:32:00,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:32:00,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 92. [2021-05-03 14:32:00,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.21978021978022) internal successors, (202), 91 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 202 transitions. [2021-05-03 14:32:00,848 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 202 transitions. Word has length 16 [2021-05-03 14:32:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:00,849 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 202 transitions. [2021-05-03 14:32:00,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:00,849 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 202 transitions. [2021-05-03 14:32:00,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:32:00,849 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:00,849 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:01,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-05-03 14:32:01,061 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:01,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1399672538, now seen corresponding path program 57 times [2021-05-03 14:32:01,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:01,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627930704] [2021-05-03 14:32:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:01,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627930704] [2021-05-03 14:32:01,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518425959] [2021-05-03 14:32:01,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:01,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:32:01,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:32:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:01,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:01,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:01,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:01,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:01,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:01,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:01,422 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:01,512 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-05-03 14:32:01,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:01,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:32:01,518 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:01,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:01,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:01,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:01,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:01,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:01,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:01,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:32:01,590 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:01,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:01,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:01,619 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:32:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:01,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:01,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:32:01,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136697135] [2021-05-03 14:32:01,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:32:01,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:01,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:32:01,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:01,713 INFO L87 Difference]: Start difference. First operand 92 states and 202 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:01,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:01,948 INFO L93 Difference]: Finished difference Result 113 states and 238 transitions. [2021-05-03 14:32:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:32:01,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:01,949 INFO L225 Difference]: With dead ends: 113 [2021-05-03 14:32:01,949 INFO L226 Difference]: Without dead ends: 101 [2021-05-03 14:32:01,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-03 14:32:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2021-05-03 14:32:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.225806451612903) internal successors, (207), 93 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 207 transitions. [2021-05-03 14:32:01,952 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 207 transitions. Word has length 16 [2021-05-03 14:32:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:01,952 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 207 transitions. [2021-05-03 14:32:01,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 207 transitions. [2021-05-03 14:32:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:32:01,953 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:01,953 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:02,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:02,181 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash -707111582, now seen corresponding path program 58 times [2021-05-03 14:32:02,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:02,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767816746] [2021-05-03 14:32:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:02,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:02,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767816746] [2021-05-03 14:32:02,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583144909] [2021-05-03 14:32:02,346 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:02,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:02,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:02,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:32:02,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:02,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:02,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:02,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:02,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:02,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:02,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:02,492 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:02,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:02,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:02,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:02,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:32:02,527 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:02,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:02,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:32:02,533 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:02,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:02,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:02,570 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:32:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:02,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:02,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:32:02,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102550661] [2021-05-03 14:32:02,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:32:02,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:02,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:32:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:02,661 INFO L87 Difference]: Start difference. First operand 94 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:03,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:03,540 INFO L93 Difference]: Finished difference Result 186 states and 370 transitions. [2021-05-03 14:32:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:32:03,540 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:32:03,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:03,541 INFO L225 Difference]: With dead ends: 186 [2021-05-03 14:32:03,541 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:32:03,541 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 848.7ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:32:03,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:32:03,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2021-05-03 14:32:03,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.268041237113402) internal successors, (220), 97 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:03,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 220 transitions. [2021-05-03 14:32:03,545 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 220 transitions. Word has length 16 [2021-05-03 14:32:03,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:03,545 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 220 transitions. [2021-05-03 14:32:03,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:03,545 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 220 transitions. [2021-05-03 14:32:03,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:32:03,546 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:03,546 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:03,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable252 [2021-05-03 14:32:03,749 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash -125256330, now seen corresponding path program 59 times [2021-05-03 14:32:03,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:03,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093516371] [2021-05-03 14:32:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:03,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093516371] [2021-05-03 14:32:03,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974148743] [2021-05-03 14:32:03,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:03,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:03,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:03,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:32:03,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:04,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:04,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:04,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:04,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:04,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:04,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:04,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:04,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:04,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:04,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:04,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:32:04,110 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:04,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:04,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:32:04,117 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:04,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:04,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:04,140 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-05-03 14:32:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:04,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:04,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:32:04,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987571597] [2021-05-03 14:32:04,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:32:04,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:04,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:32:04,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:04,232 INFO L87 Difference]: Start difference. First operand 98 states and 220 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:04,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:04,641 INFO L93 Difference]: Finished difference Result 148 states and 307 transitions. [2021-05-03 14:32:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:32:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:32:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:04,642 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:32:04,642 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 14:32:04,643 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 500.4ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:04,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 14:32:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 99. [2021-05-03 14:32:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2551020408163267) internal successors, (221), 98 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 221 transitions. [2021-05-03 14:32:04,645 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 221 transitions. Word has length 16 [2021-05-03 14:32:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:04,645 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 221 transitions. [2021-05-03 14:32:04,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:04,646 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 221 transitions. [2021-05-03 14:32:04,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:32:04,646 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:04,646 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:04,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-05-03 14:32:04,861 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1010928942, now seen corresponding path program 60 times [2021-05-03 14:32:04,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:04,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374274369] [2021-05-03 14:32:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:05,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:05,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374274369] [2021-05-03 14:32:05,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482654824] [2021-05-03 14:32:05,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:05,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:32:05,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:05,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:32:05,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:05,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:05,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:05,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:05,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:05,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:05,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:05,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:05,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:05,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:05,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:05,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:32:05,288 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:05,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:05,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:32:05,295 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:05,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:05,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:05,330 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:32:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:05,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:05,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:32:05,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859624570] [2021-05-03 14:32:05,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:32:05,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:05,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:32:05,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:05,448 INFO L87 Difference]: Start difference. First operand 99 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:06,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:06,117 INFO L93 Difference]: Finished difference Result 168 states and 343 transitions. [2021-05-03 14:32:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:32:06,117 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:32:06,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:06,118 INFO L225 Difference]: With dead ends: 168 [2021-05-03 14:32:06,118 INFO L226 Difference]: Without dead ends: 152 [2021-05-03 14:32:06,118 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 766.1ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:32:06,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-03 14:32:06,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 99. [2021-05-03 14:32:06,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2551020408163267) internal successors, (221), 98 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:06,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 221 transitions. [2021-05-03 14:32:06,122 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 221 transitions. Word has length 16 [2021-05-03 14:32:06,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:06,122 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 221 transitions. [2021-05-03 14:32:06,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:06,122 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 221 transitions. [2021-05-03 14:32:06,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:32:06,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:06,123 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:06,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-05-03 14:32:06,337 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:06,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:06,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1135241818, now seen corresponding path program 61 times [2021-05-03 14:32:06,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:06,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840387871] [2021-05-03 14:32:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:06,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840387871] [2021-05-03 14:32:06,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907947426] [2021-05-03 14:32:06,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:32:06,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:06,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:06,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:06,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:06,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:06,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:06,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:06,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:06,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:06,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:06,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:32:06,712 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:06,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:06,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:32:06,719 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:06,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:06,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:06,754 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:32:06,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:06,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:06,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-05-03 14:32:06,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363613337] [2021-05-03 14:32:06,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:06,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:06,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:06,862 INFO L87 Difference]: Start difference. First operand 99 states and 221 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:07,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:07,523 INFO L93 Difference]: Finished difference Result 193 states and 387 transitions. [2021-05-03 14:32:07,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:32:07,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:32:07,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:07,524 INFO L225 Difference]: With dead ends: 193 [2021-05-03 14:32:07,524 INFO L226 Difference]: Without dead ends: 170 [2021-05-03 14:32:07,525 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 706.5ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:32:07,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-03 14:32:07,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 99. [2021-05-03 14:32:07,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2551020408163267) internal successors, (221), 98 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 221 transitions. [2021-05-03 14:32:07,527 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 221 transitions. Word has length 16 [2021-05-03 14:32:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:07,527 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 221 transitions. [2021-05-03 14:32:07,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 221 transitions. [2021-05-03 14:32:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:32:07,528 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:07,528 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:07,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:07,733 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:07,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:07,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1052941358, now seen corresponding path program 62 times [2021-05-03 14:32:07,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:07,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927366334] [2021-05-03 14:32:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:07,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927366334] [2021-05-03 14:32:07,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072763160] [2021-05-03 14:32:07,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:08,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:08,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:08,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:32:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:08,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:08,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:08,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:08,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:08,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:08,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:32:08,261 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:08,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:08,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:08,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:08,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:08,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:08,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:08,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:32:08,327 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:08,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:08,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:08,352 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-05-03 14:32:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:08,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:08,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:32:08,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664792014] [2021-05-03 14:32:08,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:32:08,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:08,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:32:08,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:08,457 INFO L87 Difference]: Start difference. First operand 99 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:08,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:08,726 INFO L93 Difference]: Finished difference Result 153 states and 318 transitions. [2021-05-03 14:32:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:08,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:32:08,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:08,728 INFO L225 Difference]: With dead ends: 153 [2021-05-03 14:32:08,728 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:32:08,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 452.7ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:08,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:32:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2021-05-03 14:32:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2551020408163267) internal successors, (221), 98 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 221 transitions. [2021-05-03 14:32:08,731 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 221 transitions. Word has length 16 [2021-05-03 14:32:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:08,731 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 221 transitions. [2021-05-03 14:32:08,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:08,731 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 221 transitions. [2021-05-03 14:32:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:32:08,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:08,731 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:08,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:08,943 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:08,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:08,943 INFO L82 PathProgramCache]: Analyzing trace with hash -275756062, now seen corresponding path program 63 times [2021-05-03 14:32:08,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:08,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158259682] [2021-05-03 14:32:08,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:09,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158259682] [2021-05-03 14:32:09,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404968649] [2021-05-03 14:32:09,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:09,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:32:09,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:09,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:32:09,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:09,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:09,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:09,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:09,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:09,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:09,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:32:09,537 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:09,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:09,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:09,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:32:09,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:09,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:09,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:09,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:32:09,606 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:09,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:09,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:09,632 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-05-03 14:32:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:09,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:09,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-03 14:32:09,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021044595] [2021-05-03 14:32:09,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:32:09,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:09,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:32:09,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:09,741 INFO L87 Difference]: Start difference. First operand 99 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:10,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:10,077 INFO L93 Difference]: Finished difference Result 179 states and 366 transitions. [2021-05-03 14:32:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:32:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:10,078 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:32:10,078 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:32:10,078 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:10,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:32:10,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 102. [2021-05-03 14:32:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.2475247524752477) internal successors, (227), 101 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:10,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 227 transitions. [2021-05-03 14:32:10,081 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 227 transitions. Word has length 16 [2021-05-03 14:32:10,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:10,082 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 227 transitions. [2021-05-03 14:32:10,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 227 transitions. [2021-05-03 14:32:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:10,082 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:10,082 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:10,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:10,309 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash 966701318, now seen corresponding path program 64 times [2021-05-03 14:32:10,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:10,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591497763] [2021-05-03 14:32:10,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:10,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591497763] [2021-05-03 14:32:10,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568214079] [2021-05-03 14:32:10,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:10,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:10,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:10,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:10,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:10,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:10,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-03 14:32:10,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769905785] [2021-05-03 14:32:10,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:32:10,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:32:10,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:32:10,550 INFO L87 Difference]: Start difference. First operand 102 states and 227 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:10,912 INFO L93 Difference]: Finished difference Result 141 states and 292 transitions. [2021-05-03 14:32:10,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:10,912 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:10,913 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:32:10,913 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:32:10,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:32:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-05-03 14:32:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2604166666666665) internal successors, (217), 96 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 217 transitions. [2021-05-03 14:32:10,915 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 217 transitions. Word has length 17 [2021-05-03 14:32:10,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:10,915 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 217 transitions. [2021-05-03 14:32:10,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 217 transitions. [2021-05-03 14:32:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:10,916 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:10,916 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:11,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-05-03 14:32:11,117 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:11,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:11,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1397953814, now seen corresponding path program 65 times [2021-05-03 14:32:11,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:11,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111769370] [2021-05-03 14:32:11,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:11,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:11,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111769370] [2021-05-03 14:32:11,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121115769] [2021-05-03 14:32:11,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:11,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:11,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:11,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:11,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:11,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:11,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:11,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-03 14:32:11,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840029924] [2021-05-03 14:32:11,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:32:11,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:11,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:32:11,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:32:11,369 INFO L87 Difference]: Start difference. First operand 97 states and 217 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:11,519 INFO L93 Difference]: Finished difference Result 139 states and 294 transitions. [2021-05-03 14:32:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:11,521 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:32:11,521 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:32:11,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 150.7ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:32:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:32:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2021-05-03 14:32:11,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.268041237113402) internal successors, (220), 97 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 220 transitions. [2021-05-03 14:32:11,524 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 220 transitions. Word has length 17 [2021-05-03 14:32:11,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:11,524 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 220 transitions. [2021-05-03 14:32:11,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:11,525 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 220 transitions. [2021-05-03 14:32:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:11,525 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:11,525 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:11,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:11,733 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:11,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:11,733 INFO L82 PathProgramCache]: Analyzing trace with hash 846772626, now seen corresponding path program 66 times [2021-05-03 14:32:11,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:11,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823372176] [2021-05-03 14:32:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:11,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823372176] [2021-05-03 14:32:11,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018576369] [2021-05-03 14:32:11,847 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:11,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:32:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:11,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:12,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:12,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:12,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473543047] [2021-05-03 14:32:12,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:12,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:12,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:12,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:12,062 INFO L87 Difference]: Start difference. First operand 98 states and 220 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:12,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:12,572 INFO L93 Difference]: Finished difference Result 140 states and 290 transitions. [2021-05-03 14:32:12,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:12,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:12,573 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:32:12,573 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 14:32:12,574 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 544.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:12,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 14:32:12,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 98. [2021-05-03 14:32:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2577319587628866) internal successors, (219), 97 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 219 transitions. [2021-05-03 14:32:12,576 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 219 transitions. Word has length 17 [2021-05-03 14:32:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:12,576 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 219 transitions. [2021-05-03 14:32:12,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 219 transitions. [2021-05-03 14:32:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:12,576 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:12,576 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:12,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:12,777 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:12,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:12,777 INFO L82 PathProgramCache]: Analyzing trace with hash 396996678, now seen corresponding path program 67 times [2021-05-03 14:32:12,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:12,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900005159] [2021-05-03 14:32:12,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900005159] [2021-05-03 14:32:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60324942] [2021-05-03 14:32:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:12,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:12,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:13,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:13,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:13,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:13,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626683949] [2021-05-03 14:32:13,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:13,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:13,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:13,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:13,114 INFO L87 Difference]: Start difference. First operand 98 states and 219 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:13,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:13,403 INFO L93 Difference]: Finished difference Result 155 states and 325 transitions. [2021-05-03 14:32:13,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:13,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:13,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:13,405 INFO L225 Difference]: With dead ends: 155 [2021-05-03 14:32:13,405 INFO L226 Difference]: Without dead ends: 155 [2021-05-03 14:32:13,405 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:13,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-03 14:32:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 98. [2021-05-03 14:32:13,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2577319587628866) internal successors, (219), 97 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 219 transitions. [2021-05-03 14:32:13,408 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 219 transitions. Word has length 17 [2021-05-03 14:32:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:13,408 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 219 transitions. [2021-05-03 14:32:13,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:13,408 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 219 transitions. [2021-05-03 14:32:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:13,408 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:13,409 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:13,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:13,609 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:13,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1799125834, now seen corresponding path program 68 times [2021-05-03 14:32:13,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:13,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252723750] [2021-05-03 14:32:13,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:13,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252723750] [2021-05-03 14:32:13,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243881535] [2021-05-03 14:32:13,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:13,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:13,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:13,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:13,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:13,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:13,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:13,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311467333] [2021-05-03 14:32:13,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:13,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:13,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:13,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:13,954 INFO L87 Difference]: Start difference. First operand 98 states and 219 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:14,515 INFO L93 Difference]: Finished difference Result 138 states and 287 transitions. [2021-05-03 14:32:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:14,516 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:32:14,516 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:32:14,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 615.6ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:14,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:32:14,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 99. [2021-05-03 14:32:14,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2551020408163267) internal successors, (221), 98 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:14,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 221 transitions. [2021-05-03 14:32:14,519 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 221 transitions. Word has length 17 [2021-05-03 14:32:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:14,519 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 221 transitions. [2021-05-03 14:32:14,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 221 transitions. [2021-05-03 14:32:14,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:14,519 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:14,520 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:14,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:14,733 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:14,733 INFO L82 PathProgramCache]: Analyzing trace with hash -847782378, now seen corresponding path program 69 times [2021-05-03 14:32:14,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:14,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978122412] [2021-05-03 14:32:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:14,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978122412] [2021-05-03 14:32:14,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282334954] [2021-05-03 14:32:14,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:14,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:32:14,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:14,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:14,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:15,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:15,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:15,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:15,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904698799] [2021-05-03 14:32:15,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:15,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:15,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:15,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:15,045 INFO L87 Difference]: Start difference. First operand 99 states and 221 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:15,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:15,334 INFO L93 Difference]: Finished difference Result 152 states and 319 transitions. [2021-05-03 14:32:15,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:15,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:15,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:15,336 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:32:15,336 INFO L226 Difference]: Without dead ends: 152 [2021-05-03 14:32:15,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 287.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:15,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-03 14:32:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 99. [2021-05-03 14:32:15,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2551020408163267) internal successors, (221), 98 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 221 transitions. [2021-05-03 14:32:15,339 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 221 transitions. Word has length 17 [2021-05-03 14:32:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:15,339 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 221 transitions. [2021-05-03 14:32:15,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 221 transitions. [2021-05-03 14:32:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:15,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:15,340 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:15,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:15,541 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1633836398, now seen corresponding path program 70 times [2021-05-03 14:32:15,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:15,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029607941] [2021-05-03 14:32:15,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:15,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029607941] [2021-05-03 14:32:15,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459455619] [2021-05-03 14:32:15,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:15,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:15,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:15,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:15,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:15,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:15,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:15,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:15,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:15,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:15,883 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:15,932 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:32:15,932 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:15,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:15,936 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:15,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:15,953 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-05-03 14:32:15,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:15,954 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:15,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:15,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:15,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381116137] [2021-05-03 14:32:15,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:15,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:15,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:15,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:15,991 INFO L87 Difference]: Start difference. First operand 99 states and 221 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:16,652 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-05-03 14:32:16,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:16,800 INFO L93 Difference]: Finished difference Result 151 states and 308 transitions. [2021-05-03 14:32:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:16,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:16,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:16,801 INFO L225 Difference]: With dead ends: 151 [2021-05-03 14:32:16,801 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:32:16,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 850.6ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:32:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 104. [2021-05-03 14:32:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2524271844660193) internal successors, (232), 103 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 232 transitions. [2021-05-03 14:32:16,804 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 232 transitions. Word has length 17 [2021-05-03 14:32:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:16,804 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 232 transitions. [2021-05-03 14:32:16,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 232 transitions. [2021-05-03 14:32:16,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:16,805 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:16,805 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:17,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-05-03 14:32:17,017 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:17,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:17,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1857767866, now seen corresponding path program 71 times [2021-05-03 14:32:17,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:17,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701885265] [2021-05-03 14:32:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701885265] [2021-05-03 14:32:17,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588909038] [2021-05-03 14:32:17,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:17,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:32:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:17,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:32:17,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:17,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:17,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:17,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:32:17,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:17,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:17,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:32:17,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:17,420 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-05-03 14:32:17,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:17,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:32:17,426 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:17,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:17,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:17,460 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:17,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:17,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_66 vanished before elimination [2021-05-03 14:32:17,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:17,487 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:32:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:17,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:17,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:17,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416788694] [2021-05-03 14:32:17,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:17,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:17,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:17,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:17,554 INFO L87 Difference]: Start difference. First operand 104 states and 232 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:17,820 INFO L93 Difference]: Finished difference Result 153 states and 322 transitions. [2021-05-03 14:32:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:32:17,821 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:17,821 INFO L225 Difference]: With dead ends: 153 [2021-05-03 14:32:17,821 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 14:32:17,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 354.3ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:17,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 14:32:17,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-05-03 14:32:17,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2524271844660193) internal successors, (232), 103 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:17,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 232 transitions. [2021-05-03 14:32:17,824 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 232 transitions. Word has length 17 [2021-05-03 14:32:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:17,824 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 232 transitions. [2021-05-03 14:32:17,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 232 transitions. [2021-05-03 14:32:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:17,825 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:17,825 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:18,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-05-03 14:32:18,040 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash -497651126, now seen corresponding path program 72 times [2021-05-03 14:32:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:18,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126021687] [2021-05-03 14:32:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:18,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126021687] [2021-05-03 14:32:18,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782879858] [2021-05-03 14:32:18,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:18,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:32:18,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:18,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:18,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:18,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:18,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:18,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:18,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:18,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:18,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:18,401 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:18,450 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:32:18,451 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:18,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:18,455 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:18,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:18,471 INFO L518 ElimStorePlain]: Eliminatee v_prenex_68 vanished before elimination [2021-05-03 14:32:18,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:18,472 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:18,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:18,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:18,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189702409] [2021-05-03 14:32:18,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:18,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:18,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:18,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:18,506 INFO L87 Difference]: Start difference. First operand 104 states and 232 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:18,739 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-05-03 14:32:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:19,049 INFO L93 Difference]: Finished difference Result 136 states and 287 transitions. [2021-05-03 14:32:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:19,050 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:19,050 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:32:19,050 INFO L226 Difference]: Without dead ends: 136 [2021-05-03 14:32:19,050 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 616.4ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-03 14:32:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 100. [2021-05-03 14:32:19,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 99 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 223 transitions. [2021-05-03 14:32:19,053 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 223 transitions. Word has length 17 [2021-05-03 14:32:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:19,053 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 223 transitions. [2021-05-03 14:32:19,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:19,053 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 223 transitions. [2021-05-03 14:32:19,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:19,053 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:19,053 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:19,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:19,265 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:19,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1801174, now seen corresponding path program 73 times [2021-05-03 14:32:19,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:19,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675911626] [2021-05-03 14:32:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:19,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:19,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675911626] [2021-05-03 14:32:19,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561607606] [2021-05-03 14:32:19,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:19,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:19,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:19,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:19,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:19,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355806702] [2021-05-03 14:32:19,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:19,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:19,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:19,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:19,596 INFO L87 Difference]: Start difference. First operand 100 states and 223 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:19,883 INFO L93 Difference]: Finished difference Result 116 states and 247 transitions. [2021-05-03 14:32:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:19,884 INFO L225 Difference]: With dead ends: 116 [2021-05-03 14:32:19,884 INFO L226 Difference]: Without dead ends: 107 [2021-05-03 14:32:19,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-03 14:32:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 100. [2021-05-03 14:32:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.242424242424242) internal successors, (222), 99 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 222 transitions. [2021-05-03 14:32:19,886 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 222 transitions. Word has length 17 [2021-05-03 14:32:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:19,886 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 222 transitions. [2021-05-03 14:32:19,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 222 transitions. [2021-05-03 14:32:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:19,887 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:19,887 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:20,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:20,101 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:20,101 INFO L82 PathProgramCache]: Analyzing trace with hash -447974774, now seen corresponding path program 74 times [2021-05-03 14:32:20,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:20,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118216959] [2021-05-03 14:32:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:20,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118216959] [2021-05-03 14:32:20,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425277043] [2021-05-03 14:32:20,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:20,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:20,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:20,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:32:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:20,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:20,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:20,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:20,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:20,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:20,365 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-05-03 14:32:20,365 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:20,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:32:20,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:32:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:20,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:20,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:20,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096174945] [2021-05-03 14:32:20,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:20,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:20,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:20,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:20,388 INFO L87 Difference]: Start difference. First operand 100 states and 222 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:20,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:20,530 INFO L93 Difference]: Finished difference Result 119 states and 258 transitions. [2021-05-03 14:32:20,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:20,531 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:20,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:20,531 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:32:20,531 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:32:20,532 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:20,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:32:20,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2021-05-03 14:32:20,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.242424242424242) internal successors, (222), 99 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 222 transitions. [2021-05-03 14:32:20,534 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 222 transitions. Word has length 17 [2021-05-03 14:32:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:20,534 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 222 transitions. [2021-05-03 14:32:20,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 222 transitions. [2021-05-03 14:32:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:20,535 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:20,535 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:20,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-05-03 14:32:20,735 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:20,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:20,736 INFO L82 PathProgramCache]: Analyzing trace with hash 954154382, now seen corresponding path program 75 times [2021-05-03 14:32:20,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:20,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608678700] [2021-05-03 14:32:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:20,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:20,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608678700] [2021-05-03 14:32:20,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989176373] [2021-05-03 14:32:20,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:20,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:32:20,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:20,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:20,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:21,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:21,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:21,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:21,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075633479] [2021-05-03 14:32:21,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:21,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:21,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:21,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:21,061 INFO L87 Difference]: Start difference. First operand 100 states and 222 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:21,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:21,415 INFO L93 Difference]: Finished difference Result 114 states and 244 transitions. [2021-05-03 14:32:21,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:21,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:21,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:21,416 INFO L225 Difference]: With dead ends: 114 [2021-05-03 14:32:21,417 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 14:32:21,417 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:21,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 14:32:21,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2021-05-03 14:32:21,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.242424242424242) internal successors, (222), 99 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:21,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 222 transitions. [2021-05-03 14:32:21,419 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 222 transitions. Word has length 17 [2021-05-03 14:32:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:21,419 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 222 transitions. [2021-05-03 14:32:21,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 222 transitions. [2021-05-03 14:32:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:21,419 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:21,419 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:21,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-05-03 14:32:21,620 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:21,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1692753830, now seen corresponding path program 76 times [2021-05-03 14:32:21,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:21,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963563071] [2021-05-03 14:32:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:21,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963563071] [2021-05-03 14:32:21,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043143132] [2021-05-03 14:32:21,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:21,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:21,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:21,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:21,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:21,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:21,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:21,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405178053] [2021-05-03 14:32:21,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:21,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:21,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:21,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:21,905 INFO L87 Difference]: Start difference. First operand 100 states and 222 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:22,024 INFO L93 Difference]: Finished difference Result 132 states and 284 transitions. [2021-05-03 14:32:22,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:32:22,024 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:22,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:22,025 INFO L225 Difference]: With dead ends: 132 [2021-05-03 14:32:22,025 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:32:22,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:32:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 101. [2021-05-03 14:32:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.24) internal successors, (224), 100 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 224 transitions. [2021-05-03 14:32:22,027 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 224 transitions. Word has length 17 [2021-05-03 14:32:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:22,027 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 224 transitions. [2021-05-03 14:32:22,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 224 transitions. [2021-05-03 14:32:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:22,028 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:22,028 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:22,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:22,245 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:22,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1816159446, now seen corresponding path program 77 times [2021-05-03 14:32:22,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:22,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120944381] [2021-05-03 14:32:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:22,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120944381] [2021-05-03 14:32:22,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711999656] [2021-05-03 14:32:22,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:22,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:22,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:22,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:22,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:22,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:22,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:22,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:22,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:22,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:22,600 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:32:22,601 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:22,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:22,606 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:22,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:22,623 INFO L518 ElimStorePlain]: Eliminatee v_prenex_73 vanished before elimination [2021-05-03 14:32:22,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:22,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:22,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:22,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:22,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343688162] [2021-05-03 14:32:22,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:22,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:22,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:22,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:22,661 INFO L87 Difference]: Start difference. First operand 101 states and 224 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:23,073 INFO L93 Difference]: Finished difference Result 127 states and 265 transitions. [2021-05-03 14:32:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:23,074 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:32:23,075 INFO L226 Difference]: Without dead ends: 124 [2021-05-03 14:32:23,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 436.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-03 14:32:23,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 106. [2021-05-03 14:32:23,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.238095238095238) internal successors, (235), 105 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 235 transitions. [2021-05-03 14:32:23,077 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 235 transitions. Word has length 17 [2021-05-03 14:32:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:23,078 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 235 transitions. [2021-05-03 14:32:23,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:23,078 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 235 transitions. [2021-05-03 14:32:23,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:23,078 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:23,078 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:23,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2021-05-03 14:32:23,289 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:23,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:23,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2052670348, now seen corresponding path program 78 times [2021-05-03 14:32:23,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:23,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575981988] [2021-05-03 14:32:23,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:23,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575981988] [2021-05-03 14:32:23,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640954578] [2021-05-03 14:32:23,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:23,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:32:23,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:32:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:23,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:23,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:23,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:23,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:23,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:23,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:23,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:23,619 INFO L628 ElimStorePlain]: treesize reduction 74, result has 38.8 percent of original size [2021-05-03 14:32:23,620 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:23,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:23,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:32:23,626 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:23,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:23,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:23,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:32:23,656 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:23,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:23,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:23,679 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:32:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:23,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:23,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:23,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139705664] [2021-05-03 14:32:23,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:23,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:23,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:23,729 INFO L87 Difference]: Start difference. First operand 106 states and 235 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:23,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:23,859 INFO L93 Difference]: Finished difference Result 137 states and 295 transitions. [2021-05-03 14:32:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:23,860 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:23,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:23,860 INFO L225 Difference]: With dead ends: 137 [2021-05-03 14:32:23,860 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:32:23,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:23,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:32:23,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 106. [2021-05-03 14:32:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.238095238095238) internal successors, (235), 105 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:23,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 235 transitions. [2021-05-03 14:32:23,863 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 235 transitions. Word has length 17 [2021-05-03 14:32:23,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:23,863 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 235 transitions. [2021-05-03 14:32:23,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:23,863 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 235 transitions. [2021-05-03 14:32:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:23,863 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:23,863 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:24,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:24,077 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:24,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1342622578, now seen corresponding path program 79 times [2021-05-03 14:32:24,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:24,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052643875] [2021-05-03 14:32:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:24,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:24,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052643875] [2021-05-03 14:32:24,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913052509] [2021-05-03 14:32:24,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:24,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:24,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:24,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:24,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:24,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:24,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:24,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:24,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:24,438 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:32:24,438 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:24,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:24,443 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:24,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:24,464 INFO L518 ElimStorePlain]: Eliminatee v_prenex_79 vanished before elimination [2021-05-03 14:32:24,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:24,466 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:24,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:24,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:24,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776462098] [2021-05-03 14:32:24,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:24,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:24,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:24,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:24,507 INFO L87 Difference]: Start difference. First operand 106 states and 235 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:24,811 INFO L93 Difference]: Finished difference Result 112 states and 244 transitions. [2021-05-03 14:32:24,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:24,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:24,813 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:32:24,813 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 14:32:24,813 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 14:32:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 99. [2021-05-03 14:32:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2448979591836733) internal successors, (220), 98 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 220 transitions. [2021-05-03 14:32:24,815 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 220 transitions. Word has length 17 [2021-05-03 14:32:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:24,815 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 220 transitions. [2021-05-03 14:32:24,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 220 transitions. [2021-05-03 14:32:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:24,816 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:24,816 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:25,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:25,018 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:25,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:25,018 INFO L82 PathProgramCache]: Analyzing trace with hash 68356102, now seen corresponding path program 80 times [2021-05-03 14:32:25,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:25,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843302062] [2021-05-03 14:32:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:25,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:25,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:25,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843302062] [2021-05-03 14:32:25,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446859155] [2021-05-03 14:32:25,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:25,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:25,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:25,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:25,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:25,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:25,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:25,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978723125] [2021-05-03 14:32:25,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:25,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:25,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:25,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:25,291 INFO L87 Difference]: Start difference. First operand 99 states and 220 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:25,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:25,637 INFO L93 Difference]: Finished difference Result 112 states and 239 transitions. [2021-05-03 14:32:25,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:25,638 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:25,638 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:32:25,638 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 14:32:25,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 343.3ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:25,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 14:32:25,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2021-05-03 14:32:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2346938775510203) internal successors, (219), 98 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 219 transitions. [2021-05-03 14:32:25,641 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 219 transitions. Word has length 17 [2021-05-03 14:32:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:25,641 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 219 transitions. [2021-05-03 14:32:25,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 219 transitions. [2021-05-03 14:32:25,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:25,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:25,642 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:25,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:25,845 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:25,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1716415186, now seen corresponding path program 81 times [2021-05-03 14:32:25,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:25,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614193728] [2021-05-03 14:32:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:25,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614193728] [2021-05-03 14:32:25,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978450995] [2021-05-03 14:32:25,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:25,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:32:25,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:25,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:25,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:26,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:26,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:26,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135801716] [2021-05-03 14:32:26,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:26,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:26,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:26,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:26,083 INFO L87 Difference]: Start difference. First operand 99 states and 219 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:26,273 INFO L93 Difference]: Finished difference Result 130 states and 279 transitions. [2021-05-03 14:32:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:32:26,274 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:26,274 INFO L225 Difference]: With dead ends: 130 [2021-05-03 14:32:26,274 INFO L226 Difference]: Without dead ends: 130 [2021-05-03 14:32:26,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-03 14:32:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2021-05-03 14:32:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2346938775510203) internal successors, (219), 98 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 219 transitions. [2021-05-03 14:32:26,277 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 219 transitions. Word has length 17 [2021-05-03 14:32:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:26,277 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 219 transitions. [2021-05-03 14:32:26,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 219 transitions. [2021-05-03 14:32:26,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:26,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:26,278 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:26,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:26,497 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:26,497 INFO L82 PathProgramCache]: Analyzing trace with hash 930361166, now seen corresponding path program 82 times [2021-05-03 14:32:26,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:26,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798763782] [2021-05-03 14:32:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:26,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:26,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798763782] [2021-05-03 14:32:26,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145043571] [2021-05-03 14:32:26,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:26,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:26,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:26,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:26,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:26,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:26,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:26,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:26,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:26,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:26,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:26,773 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:32:26,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:26,776 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:26,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:26,790 INFO L518 ElimStorePlain]: Eliminatee v_prenex_81 vanished before elimination [2021-05-03 14:32:26,791 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:26,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:26,792 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:26,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:26,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:26,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386086687] [2021-05-03 14:32:26,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:26,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:26,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:26,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:26,826 INFO L87 Difference]: Start difference. First operand 99 states and 219 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:27,245 INFO L93 Difference]: Finished difference Result 131 states and 271 transitions. [2021-05-03 14:32:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:32:27,245 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:27,246 INFO L225 Difference]: With dead ends: 131 [2021-05-03 14:32:27,246 INFO L226 Difference]: Without dead ends: 128 [2021-05-03 14:32:27,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 385.6ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-03 14:32:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 103. [2021-05-03 14:32:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2254901960784315) internal successors, (227), 102 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 227 transitions. [2021-05-03 14:32:27,249 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 227 transitions. Word has length 17 [2021-05-03 14:32:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:27,249 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 227 transitions. [2021-05-03 14:32:27,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 227 transitions. [2021-05-03 14:32:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:27,250 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:27,250 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:27,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:27,473 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash 706429698, now seen corresponding path program 83 times [2021-05-03 14:32:27,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:27,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483028820] [2021-05-03 14:32:27,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:27,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:27,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483028820] [2021-05-03 14:32:27,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012450217] [2021-05-03 14:32:27,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:27,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:27,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:27,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:27,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:27,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87768160] [2021-05-03 14:32:27,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:27,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:27,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:27,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:27,780 INFO L87 Difference]: Start difference. First operand 103 states and 227 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:28,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:28,071 INFO L93 Difference]: Finished difference Result 140 states and 299 transitions. [2021-05-03 14:32:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:32:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:28,073 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:32:28,073 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:32:28,073 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 285.5ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:28,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:32:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2021-05-03 14:32:28,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2254901960784315) internal successors, (227), 102 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 227 transitions. [2021-05-03 14:32:28,075 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 227 transitions. Word has length 17 [2021-05-03 14:32:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:28,075 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 227 transitions. [2021-05-03 14:32:28,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 227 transitions. [2021-05-03 14:32:28,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:28,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:28,076 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:28,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:28,285 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2066546438, now seen corresponding path program 84 times [2021-05-03 14:32:28,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:28,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763083771] [2021-05-03 14:32:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:28,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:28,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763083771] [2021-05-03 14:32:28,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116834085] [2021-05-03 14:32:28,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:28,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:32:28,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:28,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:28,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:28,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:28,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:28,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:28,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:28,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:28,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:28,649 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:32:28,649 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:28,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:28,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:28,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:28,680 INFO L518 ElimStorePlain]: Eliminatee v_prenex_84 vanished before elimination [2021-05-03 14:32:28,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:28,682 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:28,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:28,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:28,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921182434] [2021-05-03 14:32:28,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:28,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:28,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:28,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:28,728 INFO L87 Difference]: Start difference. First operand 103 states and 227 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:29,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:29,112 INFO L93 Difference]: Finished difference Result 116 states and 250 transitions. [2021-05-03 14:32:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:29,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:29,114 INFO L225 Difference]: With dead ends: 116 [2021-05-03 14:32:29,114 INFO L226 Difference]: Without dead ends: 116 [2021-05-03 14:32:29,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:29,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-03 14:32:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2021-05-03 14:32:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2291666666666665) internal successors, (214), 96 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:29,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 214 transitions. [2021-05-03 14:32:29,115 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 214 transitions. Word has length 17 [2021-05-03 14:32:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:29,116 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 214 transitions. [2021-05-03 14:32:29,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:29,116 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 214 transitions. [2021-05-03 14:32:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:29,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:29,116 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:29,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-05-03 14:32:29,317 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:29,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1176422954, now seen corresponding path program 85 times [2021-05-03 14:32:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:29,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55081674] [2021-05-03 14:32:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:29,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:29,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55081674] [2021-05-03 14:32:29,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405937464] [2021-05-03 14:32:29,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:29,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:29,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:29,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:29,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:29,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:29,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:29,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:29,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:29,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:29,540 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:29,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:29,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:29,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:29,547 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:29,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:29,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:29,553 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:29,594 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:32:29,594 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:29,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:29,596 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:29,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:29,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:29,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919734752] [2021-05-03 14:32:29,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:29,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:29,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:29,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:29,629 INFO L87 Difference]: Start difference. First operand 97 states and 214 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:29,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:29,856 INFO L93 Difference]: Finished difference Result 143 states and 295 transitions. [2021-05-03 14:32:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:32:29,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:29,857 INFO L225 Difference]: With dead ends: 143 [2021-05-03 14:32:29,857 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:32:29,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:29,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:32:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 104. [2021-05-03 14:32:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2524271844660193) internal successors, (232), 103 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 232 transitions. [2021-05-03 14:32:29,859 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 232 transitions. Word has length 17 [2021-05-03 14:32:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:29,859 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 232 transitions. [2021-05-03 14:32:29,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 232 transitions. [2021-05-03 14:32:29,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:29,860 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:29,860 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:30,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2021-05-03 14:32:30,073 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:30,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1400354422, now seen corresponding path program 86 times [2021-05-03 14:32:30,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:30,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338084548] [2021-05-03 14:32:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338084548] [2021-05-03 14:32:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707721560] [2021-05-03 14:32:30,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:30,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:30,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:30,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:32:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:30,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:30,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:30,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:32:30,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:30,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:30,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:30,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:30,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:30,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:30,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:30,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:30,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:30,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:30,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:32:30,346 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:30,402 INFO L628 ElimStorePlain]: treesize reduction 71, result has 37.2 percent of original size [2021-05-03 14:32:30,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:30,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:32:30,408 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:30,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:30,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:30,431 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-05-03 14:32:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:30,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:30,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:30,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472156550] [2021-05-03 14:32:30,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:30,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:30,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:30,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:30,485 INFO L87 Difference]: Start difference. First operand 104 states and 232 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:30,706 INFO L93 Difference]: Finished difference Result 137 states and 286 transitions. [2021-05-03 14:32:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:30,708 INFO L225 Difference]: With dead ends: 137 [2021-05-03 14:32:30,708 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:32:30,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:32:30,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-05-03 14:32:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2524271844660193) internal successors, (232), 103 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:30,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 232 transitions. [2021-05-03 14:32:30,710 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 232 transitions. Word has length 17 [2021-05-03 14:32:30,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:30,710 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 232 transitions. [2021-05-03 14:32:30,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 232 transitions. [2021-05-03 14:32:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:30,711 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:30,711 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:30,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-05-03 14:32:30,925 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1483822042, now seen corresponding path program 87 times [2021-05-03 14:32:30,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:30,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303641039] [2021-05-03 14:32:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:31,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303641039] [2021-05-03 14:32:31,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062770309] [2021-05-03 14:32:31,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:31,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:32:31,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:32:31,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:31,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:31,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:31,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:31,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:31,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:31,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:31,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:31,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:31,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:31,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:31,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:32:31,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:31,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:31,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:32:31,201 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:31,257 INFO L628 ElimStorePlain]: treesize reduction 69, result has 37.8 percent of original size [2021-05-03 14:32:31,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:31,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:32:31,267 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:32:31,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:31,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:31,301 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-05-03 14:32:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:31,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:31,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:31,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928121048] [2021-05-03 14:32:31,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:31,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:31,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:31,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:31,341 INFO L87 Difference]: Start difference. First operand 104 states and 232 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:31,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:31,611 INFO L93 Difference]: Finished difference Result 135 states and 279 transitions. [2021-05-03 14:32:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:31,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:31,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:31,612 INFO L225 Difference]: With dead ends: 135 [2021-05-03 14:32:31,612 INFO L226 Difference]: Without dead ends: 133 [2021-05-03 14:32:31,612 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:31,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-03 14:32:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 104. [2021-05-03 14:32:31,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2427184466019416) internal successors, (231), 103 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:31,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 231 transitions. [2021-05-03 14:32:31,614 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 231 transitions. Word has length 17 [2021-05-03 14:32:31,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:31,614 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 231 transitions. [2021-05-03 14:32:31,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:31,614 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 231 transitions. [2021-05-03 14:32:31,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:31,614 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:31,614 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:31,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-05-03 14:32:31,815 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:31,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:31,815 INFO L82 PathProgramCache]: Analyzing trace with hash -40237682, now seen corresponding path program 88 times [2021-05-03 14:32:31,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:31,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752297345] [2021-05-03 14:32:31,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:31,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:31,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752297345] [2021-05-03 14:32:31,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493178189] [2021-05-03 14:32:31,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:31,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:31,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:31,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:31,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:32,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:32,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:32,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:32,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:32,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:32,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:32,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:32,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:32,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:32,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:32,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:32,063 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:32,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:32,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:32,068 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:32,109 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:32:32,109 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:32,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:32,111 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:32,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:32,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:32,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451374645] [2021-05-03 14:32:32,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:32,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:32,142 INFO L87 Difference]: Start difference. First operand 104 states and 231 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:32,414 INFO L93 Difference]: Finished difference Result 149 states and 309 transitions. [2021-05-03 14:32:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:32:32,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:32,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:32,415 INFO L225 Difference]: With dead ends: 149 [2021-05-03 14:32:32,415 INFO L226 Difference]: Without dead ends: 149 [2021-05-03 14:32:32,415 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:32:32,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-03 14:32:32,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2021-05-03 14:32:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2450980392156863) internal successors, (229), 102 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:32,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 229 transitions. [2021-05-03 14:32:32,417 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 229 transitions. Word has length 17 [2021-05-03 14:32:32,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:32,417 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 229 transitions. [2021-05-03 14:32:32,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:32,417 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 229 transitions. [2021-05-03 14:32:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:32,418 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:32,418 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:32,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:32,618 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:32,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:32,619 INFO L82 PathProgramCache]: Analyzing trace with hash 2021677620, now seen corresponding path program 89 times [2021-05-03 14:32:32,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:32,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113658742] [2021-05-03 14:32:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:32,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:32,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113658742] [2021-05-03 14:32:32,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412123583] [2021-05-03 14:32:32,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:32,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:32,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:32,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:32,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:32,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:32,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191210872] [2021-05-03 14:32:32,829 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:32,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:32,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:32,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:32,829 INFO L87 Difference]: Start difference. First operand 103 states and 229 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:33,089 INFO L93 Difference]: Finished difference Result 114 states and 245 transitions. [2021-05-03 14:32:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:33,090 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:33,090 INFO L225 Difference]: With dead ends: 114 [2021-05-03 14:32:33,090 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 14:32:33,091 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:33,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 14:32:33,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2021-05-03 14:32:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.235294117647059) internal successors, (228), 102 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 228 transitions. [2021-05-03 14:32:33,092 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 228 transitions. Word has length 17 [2021-05-03 14:32:33,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:33,092 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 228 transitions. [2021-05-03 14:32:33,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:33,092 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 228 transitions. [2021-05-03 14:32:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:33,093 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:33,093 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:33,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:33,293 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:33,294 INFO L82 PathProgramCache]: Analyzing trace with hash 2108558854, now seen corresponding path program 90 times [2021-05-03 14:32:33,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:33,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803915269] [2021-05-03 14:32:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:33,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:33,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803915269] [2021-05-03 14:32:33,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045252472] [2021-05-03 14:32:33,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:33,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:32:33,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:33,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:33,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:33,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:33,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:33,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:33,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:33,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:33,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:33,553 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:33,575 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:32:33,575 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:33,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:32:33,577 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:32:33,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:33,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:33,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:32:33,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407321067] [2021-05-03 14:32:33,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:32:33,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:33,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:32:33,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:32:33,587 INFO L87 Difference]: Start difference. First operand 103 states and 228 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:33,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:33,845 INFO L93 Difference]: Finished difference Result 126 states and 270 transitions. [2021-05-03 14:32:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:33,846 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:33,847 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:32:33,847 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:32:33,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:32:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-05-03 14:32:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2268041237113403) internal successors, (216), 97 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 216 transitions. [2021-05-03 14:32:33,850 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 216 transitions. Word has length 17 [2021-05-03 14:32:33,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:33,850 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 216 transitions. [2021-05-03 14:32:33,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:33,850 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 216 transitions. [2021-05-03 14:32:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:33,850 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:33,850 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:34,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2021-05-03 14:32:34,051 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:34,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -422510062, now seen corresponding path program 91 times [2021-05-03 14:32:34,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:34,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139834074] [2021-05-03 14:32:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:34,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139834074] [2021-05-03 14:32:34,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059392608] [2021-05-03 14:32:34,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:34,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:34,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:34,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:34,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:34,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864938892] [2021-05-03 14:32:34,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:34,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:34,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:34,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:34,339 INFO L87 Difference]: Start difference. First operand 98 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:34,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:34,635 INFO L93 Difference]: Finished difference Result 111 states and 237 transitions. [2021-05-03 14:32:34,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:34,636 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:34,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:34,636 INFO L225 Difference]: With dead ends: 111 [2021-05-03 14:32:34,636 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 14:32:34,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:34,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 14:32:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-05-03 14:32:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2244897959183674) internal successors, (218), 98 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 218 transitions. [2021-05-03 14:32:34,638 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 218 transitions. Word has length 17 [2021-05-03 14:32:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:34,638 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 218 transitions. [2021-05-03 14:32:34,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 218 transitions. [2021-05-03 14:32:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:34,638 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:34,638 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:34,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2021-05-03 14:32:34,839 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:34,840 INFO L82 PathProgramCache]: Analyzing trace with hash -872286010, now seen corresponding path program 92 times [2021-05-03 14:32:34,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:34,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473659566] [2021-05-03 14:32:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:34,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473659566] [2021-05-03 14:32:34,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992766587] [2021-05-03 14:32:34,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:34,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:34,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:34,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:34,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:35,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:35,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:32:35,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558063940] [2021-05-03 14:32:35,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:35,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:35,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:35,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:35,197 INFO L87 Difference]: Start difference. First operand 99 states and 218 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:35,359 INFO L93 Difference]: Finished difference Result 114 states and 248 transitions. [2021-05-03 14:32:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:35,361 INFO L225 Difference]: With dead ends: 114 [2021-05-03 14:32:35,361 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 14:32:35,361 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:35,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 14:32:35,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2021-05-03 14:32:35,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.2244897959183674) internal successors, (218), 98 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:35,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 218 transitions. [2021-05-03 14:32:35,363 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 218 transitions. Word has length 17 [2021-05-03 14:32:35,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:35,363 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 218 transitions. [2021-05-03 14:32:35,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:35,363 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 218 transitions. [2021-05-03 14:32:35,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:35,364 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:35,364 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:35,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-05-03 14:32:35,565 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:35,565 INFO L82 PathProgramCache]: Analyzing trace with hash 529843146, now seen corresponding path program 93 times [2021-05-03 14:32:35,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:35,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593787731] [2021-05-03 14:32:35,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:35,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:35,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593787731] [2021-05-03 14:32:35,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085056907] [2021-05-03 14:32:35,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:35,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:32:35,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:35,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:35,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:35,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:35,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:35,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:35,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200988597] [2021-05-03 14:32:35,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:35,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:35,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:35,951 INFO L87 Difference]: Start difference. First operand 99 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:36,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:36,358 INFO L93 Difference]: Finished difference Result 109 states and 234 transitions. [2021-05-03 14:32:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:36,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:36,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:36,359 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:32:36,359 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:32:36,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:36,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:32:36,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-05-03 14:32:36,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 220 transitions. [2021-05-03 14:32:36,361 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 220 transitions. Word has length 17 [2021-05-03 14:32:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:36,361 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 220 transitions. [2021-05-03 14:32:36,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 220 transitions. [2021-05-03 14:32:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:36,365 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:36,365 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:36,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable445 [2021-05-03 14:32:36,565 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:36,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2117065066, now seen corresponding path program 94 times [2021-05-03 14:32:36,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:36,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862182367] [2021-05-03 14:32:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:36,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:36,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862182367] [2021-05-03 14:32:36,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461944302] [2021-05-03 14:32:36,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:36,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:36,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:36,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:36,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:36,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:36,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:32:36,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402460044] [2021-05-03 14:32:36,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:36,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:36,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:36,953 INFO L87 Difference]: Start difference. First operand 100 states and 220 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:37,430 INFO L93 Difference]: Finished difference Result 127 states and 274 transitions. [2021-05-03 14:32:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:32:37,431 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:37,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:37,432 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:32:37,432 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:32:37,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:32:37,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:32:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-05-03 14:32:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 220 transitions. [2021-05-03 14:32:37,434 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 220 transitions. Word has length 17 [2021-05-03 14:32:37,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:37,435 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 220 transitions. [2021-05-03 14:32:37,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 220 transitions. [2021-05-03 14:32:37,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:37,435 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:37,435 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:37,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:37,649 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:37,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:37,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1391848210, now seen corresponding path program 95 times [2021-05-03 14:32:37,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:37,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394618542] [2021-05-03 14:32:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:37,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:37,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394618542] [2021-05-03 14:32:37,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421447747] [2021-05-03 14:32:37,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:37,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:37,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:37,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:38,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:38,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:38,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:38,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:38,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:38,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:38,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:38,077 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:32:38,077 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:38,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:38,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:38,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:38,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-05-03 14:32:38,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:38,100 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:38,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:38,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:38,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084538824] [2021-05-03 14:32:38,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:38,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:38,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:38,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:38,139 INFO L87 Difference]: Start difference. First operand 100 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:38,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:38,692 INFO L93 Difference]: Finished difference Result 129 states and 269 transitions. [2021-05-03 14:32:38,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:32:38,692 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:38,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:38,693 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:32:38,693 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:32:38,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 585.4ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:38,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:32:38,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 105. [2021-05-03 14:32:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.230769230769231) internal successors, (232), 104 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:38,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 232 transitions. [2021-05-03 14:32:38,698 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 232 transitions. Word has length 17 [2021-05-03 14:32:38,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:38,699 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 232 transitions. [2021-05-03 14:32:38,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 232 transitions. [2021-05-03 14:32:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:38,699 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:38,699 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:38,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-05-03 14:32:38,913 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1167916742, now seen corresponding path program 96 times [2021-05-03 14:32:38,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:38,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299022094] [2021-05-03 14:32:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:39,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299022094] [2021-05-03 14:32:39,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090712691] [2021-05-03 14:32:39,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:39,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:32:39,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:39,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:39,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:39,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:32:39,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838147718] [2021-05-03 14:32:39,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:39,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:39,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:39,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:39,259 INFO L87 Difference]: Start difference. First operand 105 states and 232 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:39,872 INFO L93 Difference]: Finished difference Result 151 states and 316 transitions. [2021-05-03 14:32:39,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:32:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:39,874 INFO L225 Difference]: With dead ends: 151 [2021-05-03 14:32:39,874 INFO L226 Difference]: Without dead ends: 151 [2021-05-03 14:32:39,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 592.4ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:32:39,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-03 14:32:39,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2021-05-03 14:32:39,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.230769230769231) internal successors, (232), 104 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:39,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 232 transitions. [2021-05-03 14:32:39,877 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 232 transitions. Word has length 17 [2021-05-03 14:32:39,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:39,877 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 232 transitions. [2021-05-03 14:32:39,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:39,877 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 232 transitions. [2021-05-03 14:32:39,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:39,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:39,877 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:40,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2021-05-03 14:32:40,093 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:40,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:40,093 INFO L82 PathProgramCache]: Analyzing trace with hash -242874090, now seen corresponding path program 97 times [2021-05-03 14:32:40,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:40,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698882224] [2021-05-03 14:32:40,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:40,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698882224] [2021-05-03 14:32:40,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073788128] [2021-05-03 14:32:40,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:40,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:40,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:40,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:40,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:40,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740059937] [2021-05-03 14:32:40,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:40,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:40,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:40,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:40,388 INFO L87 Difference]: Start difference. First operand 105 states and 232 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:40,734 INFO L93 Difference]: Finished difference Result 128 states and 275 transitions. [2021-05-03 14:32:40,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:32:40,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:40,735 INFO L225 Difference]: With dead ends: 128 [2021-05-03 14:32:40,735 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:32:40,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:40,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:32:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 105. [2021-05-03 14:32:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.2211538461538463) internal successors, (231), 104 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 231 transitions. [2021-05-03 14:32:40,738 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 231 transitions. Word has length 17 [2021-05-03 14:32:40,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:40,738 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 231 transitions. [2021-05-03 14:32:40,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 231 transitions. [2021-05-03 14:32:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:40,739 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:40,739 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:40,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:40,945 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1766933814, now seen corresponding path program 98 times [2021-05-03 14:32:40,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:40,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202841218] [2021-05-03 14:32:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:41,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:41,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202841218] [2021-05-03 14:32:41,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013512048] [2021-05-03 14:32:41,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:41,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:41,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:41,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:41,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:41,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:41,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:41,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:41,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:41,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:41,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:41,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:41,400 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:32:41,401 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:41,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:41,406 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:41,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:41,430 INFO L518 ElimStorePlain]: Eliminatee v_prenex_95 vanished before elimination [2021-05-03 14:32:41,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:41,432 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:41,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:41,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:41,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093870698] [2021-05-03 14:32:41,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:41,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:41,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:41,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:41,476 INFO L87 Difference]: Start difference. First operand 105 states and 231 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:41,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:41,879 INFO L93 Difference]: Finished difference Result 112 states and 244 transitions. [2021-05-03 14:32:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:32:41,880 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:41,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:41,880 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:32:41,880 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 14:32:41,880 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:41,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 14:32:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 97. [2021-05-03 14:32:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2291666666666665) internal successors, (214), 96 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 214 transitions. [2021-05-03 14:32:41,882 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 214 transitions. Word has length 17 [2021-05-03 14:32:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:41,882 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 214 transitions. [2021-05-03 14:32:41,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 214 transitions. [2021-05-03 14:32:41,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:41,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:41,883 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:42,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:42,085 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2045898038, now seen corresponding path program 99 times [2021-05-03 14:32:42,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:42,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742986775] [2021-05-03 14:32:42,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742986775] [2021-05-03 14:32:42,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574515580] [2021-05-03 14:32:42,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:42,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:32:42,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:42,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:32:42,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:42,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:42,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:42,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178895048] [2021-05-03 14:32:42,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:42,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:42,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:42,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:42,427 INFO L87 Difference]: Start difference. First operand 97 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:42,640 INFO L93 Difference]: Finished difference Result 107 states and 229 transitions. [2021-05-03 14:32:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:32:42,641 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:42,642 INFO L225 Difference]: With dead ends: 107 [2021-05-03 14:32:42,642 INFO L226 Difference]: Without dead ends: 101 [2021-05-03 14:32:42,642 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 232.6ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-03 14:32:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2021-05-03 14:32:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.221052631578947) internal successors, (211), 95 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:42,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 211 transitions. [2021-05-03 14:32:42,644 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 211 transitions. Word has length 17 [2021-05-03 14:32:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:42,644 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 211 transitions. [2021-05-03 14:32:42,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 211 transitions. [2021-05-03 14:32:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:42,644 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:42,645 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:42,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-05-03 14:32:42,857 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:42,857 INFO L82 PathProgramCache]: Analyzing trace with hash -397838954, now seen corresponding path program 100 times [2021-05-03 14:32:42,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:42,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309132758] [2021-05-03 14:32:42,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:42,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:42,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309132758] [2021-05-03 14:32:42,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104291523] [2021-05-03 14:32:42,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:42,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:42,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:43,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:43,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:32:43,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304366728] [2021-05-03 14:32:43,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:43,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:43,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:43,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:43,193 INFO L87 Difference]: Start difference. First operand 96 states and 211 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:43,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:43,390 INFO L93 Difference]: Finished difference Result 119 states and 257 transitions. [2021-05-03 14:32:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:43,391 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:32:43,391 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:32:43,392 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:32:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2021-05-03 14:32:43,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.21875) internal successors, (213), 96 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:43,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 213 transitions. [2021-05-03 14:32:43,394 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 213 transitions. Word has length 17 [2021-05-03 14:32:43,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:43,394 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 213 transitions. [2021-05-03 14:32:43,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:43,394 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 213 transitions. [2021-05-03 14:32:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:43,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:43,395 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:43,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-05-03 14:32:43,595 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1183892974, now seen corresponding path program 101 times [2021-05-03 14:32:43,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:43,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449663975] [2021-05-03 14:32:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:43,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449663975] [2021-05-03 14:32:43,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315657001] [2021-05-03 14:32:43,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:43,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:43,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:43,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:43,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:43,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:43,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:43,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:43,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:43,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:43,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:43,925 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:43,990 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:32:43,990 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:43,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:32:43,996 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:44,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:44,020 INFO L518 ElimStorePlain]: Eliminatee v_prenex_97 vanished before elimination [2021-05-03 14:32:44,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:44,022 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:44,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:44,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:44,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887992343] [2021-05-03 14:32:44,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:44,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:44,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:44,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:44,076 INFO L87 Difference]: Start difference. First operand 97 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:44,428 INFO L93 Difference]: Finished difference Result 125 states and 260 transitions. [2021-05-03 14:32:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:44,429 INFO L225 Difference]: With dead ends: 125 [2021-05-03 14:32:44,429 INFO L226 Difference]: Without dead ends: 122 [2021-05-03 14:32:44,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:44,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-03 14:32:44,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-05-03 14:32:44,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.217821782178218) internal successors, (224), 101 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 224 transitions. [2021-05-03 14:32:44,431 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 224 transitions. Word has length 17 [2021-05-03 14:32:44,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:44,431 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 224 transitions. [2021-05-03 14:32:44,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 224 transitions. [2021-05-03 14:32:44,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:44,432 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:44,432 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:44,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable500 [2021-05-03 14:32:44,637 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:44,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:44,637 INFO L82 PathProgramCache]: Analyzing trace with hash -757755472, now seen corresponding path program 102 times [2021-05-03 14:32:44,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:44,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175482142] [2021-05-03 14:32:44,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:44,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175482142] [2021-05-03 14:32:44,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894376592] [2021-05-03 14:32:44,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:44,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:32:44,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:44,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:44,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:44,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:44,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:32:44,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925597539] [2021-05-03 14:32:44,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:44,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:44,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:44,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:44,946 INFO L87 Difference]: Start difference. First operand 102 states and 224 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:45,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:45,170 INFO L93 Difference]: Finished difference Result 139 states and 299 transitions. [2021-05-03 14:32:45,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:45,171 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:45,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:45,171 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:32:45,171 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:32:45,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:45,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:32:45,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 102. [2021-05-03 14:32:45,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.217821782178218) internal successors, (224), 101 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 224 transitions. [2021-05-03 14:32:45,174 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 224 transitions. Word has length 17 [2021-05-03 14:32:45,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:45,174 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 224 transitions. [2021-05-03 14:32:45,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:45,174 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 224 transitions. [2021-05-03 14:32:45,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:45,174 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:45,174 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:45,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:45,389 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash -47707702, now seen corresponding path program 103 times [2021-05-03 14:32:45,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:45,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146544191] [2021-05-03 14:32:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:45,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:45,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146544191] [2021-05-03 14:32:45,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605553084] [2021-05-03 14:32:45,476 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:45,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:45,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:45,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:45,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:45,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:45,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:45,619 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:45,671 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:32:45,671 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:45,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:32:45,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:45,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:32:45,693 INFO L518 ElimStorePlain]: Eliminatee v_prenex_102 vanished before elimination [2021-05-03 14:32:45,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:45,694 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:45,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:45,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:45,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741638483] [2021-05-03 14:32:45,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:45,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:45,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:45,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:45,728 INFO L87 Difference]: Start difference. First operand 102 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:45,944 INFO L93 Difference]: Finished difference Result 110 states and 239 transitions. [2021-05-03 14:32:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:45,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:45,946 INFO L225 Difference]: With dead ends: 110 [2021-05-03 14:32:45,946 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 14:32:45,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 14:32:45,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2021-05-03 14:32:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.221052631578947) internal successors, (211), 95 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 211 transitions. [2021-05-03 14:32:45,947 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 211 transitions. Word has length 17 [2021-05-03 14:32:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:45,947 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 211 transitions. [2021-05-03 14:32:45,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:45,947 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 211 transitions. [2021-05-03 14:32:45,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:45,948 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:45,948 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:46,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable518 [2021-05-03 14:32:46,149 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1004290202, now seen corresponding path program 104 times [2021-05-03 14:32:46,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:46,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927664409] [2021-05-03 14:32:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:46,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927664409] [2021-05-03 14:32:46,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393862616] [2021-05-03 14:32:46,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:46,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:46,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:46,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:46,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:46,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:46,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:46,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:46,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:46,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:46,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:46,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:46,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:46,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:46,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:46,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:46,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:46,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:46,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:46,414 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:46,469 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:32:46,469 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:46,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:46,471 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:46,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:46,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:46,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916045793] [2021-05-03 14:32:46,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:46,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:46,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:46,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:46,519 INFO L87 Difference]: Start difference. First operand 96 states and 211 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:46,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:46,862 INFO L93 Difference]: Finished difference Result 138 states and 286 transitions. [2021-05-03 14:32:46,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:46,863 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:46,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:46,864 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:32:46,864 INFO L226 Difference]: Without dead ends: 135 [2021-05-03 14:32:46,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:46,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-03 14:32:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 103. [2021-05-03 14:32:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2450980392156863) internal successors, (229), 102 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 229 transitions. [2021-05-03 14:32:46,867 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 229 transitions. Word has length 17 [2021-05-03 14:32:46,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:46,867 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 229 transitions. [2021-05-03 14:32:46,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:46,867 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 229 transitions. [2021-05-03 14:32:46,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:46,868 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:46,868 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:47,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-05-03 14:32:47,075 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:47,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:47,075 INFO L82 PathProgramCache]: Analyzing trace with hash 780358734, now seen corresponding path program 105 times [2021-05-03 14:32:47,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:47,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727249865] [2021-05-03 14:32:47,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:47,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727249865] [2021-05-03 14:32:47,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299803065] [2021-05-03 14:32:47,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:47,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:32:47,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:47,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:47,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:47,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:47,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:32:47,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466777473] [2021-05-03 14:32:47,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:47,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:47,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:47,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:47,374 INFO L87 Difference]: Start difference. First operand 103 states and 229 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:47,687 INFO L93 Difference]: Finished difference Result 130 states and 274 transitions. [2021-05-03 14:32:47,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:47,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:47,688 INFO L225 Difference]: With dead ends: 130 [2021-05-03 14:32:47,689 INFO L226 Difference]: Without dead ends: 130 [2021-05-03 14:32:47,689 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:32:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-03 14:32:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2021-05-03 14:32:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2450980392156863) internal successors, (229), 102 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 229 transitions. [2021-05-03 14:32:47,690 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 229 transitions. Word has length 17 [2021-05-03 14:32:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:47,691 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 229 transitions. [2021-05-03 14:32:47,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 229 transitions. [2021-05-03 14:32:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:47,691 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:47,691 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:47,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-05-03 14:32:47,892 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:47,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:47,892 INFO L82 PathProgramCache]: Analyzing trace with hash -630432098, now seen corresponding path program 106 times [2021-05-03 14:32:47,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:47,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538709288] [2021-05-03 14:32:47,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:48,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538709288] [2021-05-03 14:32:48,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435715541] [2021-05-03 14:32:48,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:48,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:48,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:48,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:48,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:48,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:48,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604725798] [2021-05-03 14:32:48,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:48,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:48,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:48,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:48,210 INFO L87 Difference]: Start difference. First operand 103 states and 229 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:48,638 INFO L93 Difference]: Finished difference Result 132 states and 275 transitions. [2021-05-03 14:32:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:32:48,638 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:48,639 INFO L225 Difference]: With dead ends: 132 [2021-05-03 14:32:48,639 INFO L226 Difference]: Without dead ends: 130 [2021-05-03 14:32:48,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:48,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-03 14:32:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 103. [2021-05-03 14:32:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.235294117647059) internal successors, (228), 102 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 228 transitions. [2021-05-03 14:32:48,642 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 228 transitions. Word has length 17 [2021-05-03 14:32:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:48,642 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 228 transitions. [2021-05-03 14:32:48,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 228 transitions. [2021-05-03 14:32:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:48,642 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:48,642 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:48,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:48,853 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:48,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:48,853 INFO L82 PathProgramCache]: Analyzing trace with hash 2140475474, now seen corresponding path program 107 times [2021-05-03 14:32:48,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:48,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246895080] [2021-05-03 14:32:48,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:48,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246895080] [2021-05-03 14:32:48,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815989699] [2021-05-03 14:32:48,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:48,970 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:32:48,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:49,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:49,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:49,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:49,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:49,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:49,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:49,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:49,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:49,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:49,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:49,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:49,116 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:49,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:49,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:49,122 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:49,164 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:32:49,165 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:49,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:49,166 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:49,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:49,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:49,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431821583] [2021-05-03 14:32:49,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:49,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:49,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:49,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:49,199 INFO L87 Difference]: Start difference. First operand 103 states and 228 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:49,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:49,468 INFO L93 Difference]: Finished difference Result 141 states and 294 transitions. [2021-05-03 14:32:49,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:49,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:49,469 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:32:49,469 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:32:49,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 309.8ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:32:49,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 102. [2021-05-03 14:32:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.237623762376238) internal successors, (226), 101 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:49,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 226 transitions. [2021-05-03 14:32:49,471 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 226 transitions. Word has length 17 [2021-05-03 14:32:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:49,471 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 226 transitions. [2021-05-03 14:32:49,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:49,471 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 226 transitions. [2021-05-03 14:32:49,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:49,472 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:49,472 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:49,672 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-05-03 14:32:49,672 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:49,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:49,673 INFO L82 PathProgramCache]: Analyzing trace with hash -92576520, now seen corresponding path program 108 times [2021-05-03 14:32:49,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:49,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328227660] [2021-05-03 14:32:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:49,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328227660] [2021-05-03 14:32:49,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826742732] [2021-05-03 14:32:49,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:49,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:32:49,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:49,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:49,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:49,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:49,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:49,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:49,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450159887] [2021-05-03 14:32:49,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:49,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:49,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:49,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:49,910 INFO L87 Difference]: Start difference. First operand 102 states and 226 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:50,177 INFO L93 Difference]: Finished difference Result 109 states and 236 transitions. [2021-05-03 14:32:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:50,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:50,178 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:32:50,178 INFO L226 Difference]: Without dead ends: 105 [2021-05-03 14:32:50,179 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-03 14:32:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2021-05-03 14:32:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.227722772277228) internal successors, (225), 101 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 225 transitions. [2021-05-03 14:32:50,180 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 225 transitions. Word has length 17 [2021-05-03 14:32:50,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:50,180 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 225 transitions. [2021-05-03 14:32:50,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:50,181 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 225 transitions. [2021-05-03 14:32:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:50,181 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:50,181 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:50,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:50,382 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash -5695286, now seen corresponding path program 109 times [2021-05-03 14:32:50,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:50,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385726981] [2021-05-03 14:32:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:50,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385726981] [2021-05-03 14:32:50,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087358954] [2021-05-03 14:32:50,470 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:50,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:50,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:50,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:50,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:50,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:50,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:50,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:50,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:50,635 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:32:50,635 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:50,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:32:50,636 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:32:50,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:50,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:50,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:50,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900941623] [2021-05-03 14:32:50,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:50,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:50,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:50,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:50,645 INFO L87 Difference]: Start difference. First operand 102 states and 225 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:50,801 INFO L93 Difference]: Finished difference Result 118 states and 255 transitions. [2021-05-03 14:32:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:32:50,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:50,802 INFO L225 Difference]: With dead ends: 118 [2021-05-03 14:32:50,802 INFO L226 Difference]: Without dead ends: 118 [2021-05-03 14:32:50,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:50,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-03 14:32:50,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2021-05-03 14:32:50,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.223404255319149) internal successors, (209), 94 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:50,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 209 transitions. [2021-05-03 14:32:50,803 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 209 transitions. Word has length 17 [2021-05-03 14:32:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:50,804 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 209 transitions. [2021-05-03 14:32:50,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:50,804 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 209 transitions. [2021-05-03 14:32:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:50,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:50,804 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:51,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:51,005 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:51,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash 118491922, now seen corresponding path program 110 times [2021-05-03 14:32:51,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:51,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673719461] [2021-05-03 14:32:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:51,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:51,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673719461] [2021-05-03 14:32:51,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700841952] [2021-05-03 14:32:51,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:51,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:51,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:51,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:51,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:51,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:51,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:51,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:51,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:51,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:51,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:51,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:51,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:51,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:51,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:51,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:51,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:51,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:51,354 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:51,412 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:32:51,413 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:51,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:51,414 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:51,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:51,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832304163] [2021-05-03 14:32:51,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:51,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:51,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:51,461 INFO L87 Difference]: Start difference. First operand 95 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:51,833 INFO L93 Difference]: Finished difference Result 136 states and 282 transitions. [2021-05-03 14:32:51,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:32:51,837 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:51,838 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:32:51,838 INFO L226 Difference]: Without dead ends: 133 [2021-05-03 14:32:51,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 397.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:32:51,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-03 14:32:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 104. [2021-05-03 14:32:51,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.262135922330097) internal successors, (233), 103 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 233 transitions. [2021-05-03 14:32:51,840 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 233 transitions. Word has length 17 [2021-05-03 14:32:51,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:51,841 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 233 transitions. [2021-05-03 14:32:51,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:51,841 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 233 transitions. [2021-05-03 14:32:51,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:51,841 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:51,842 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:52,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-05-03 14:32:52,045 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:52,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:52,045 INFO L82 PathProgramCache]: Analyzing trace with hash -105439546, now seen corresponding path program 111 times [2021-05-03 14:32:52,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:52,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649628672] [2021-05-03 14:32:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:52,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:52,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649628672] [2021-05-03 14:32:52,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336468801] [2021-05-03 14:32:52,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:52,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:32:52,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:52,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:52,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:52,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:52,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:32:52,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119230513] [2021-05-03 14:32:52,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:52,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:52,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:52,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:52,343 INFO L87 Difference]: Start difference. First operand 104 states and 233 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:52,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:52,722 INFO L93 Difference]: Finished difference Result 134 states and 283 transitions. [2021-05-03 14:32:52,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:32:52,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:52,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:52,723 INFO L225 Difference]: With dead ends: 134 [2021-05-03 14:32:52,723 INFO L226 Difference]: Without dead ends: 134 [2021-05-03 14:32:52,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:32:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-03 14:32:52,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-05-03 14:32:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.262135922330097) internal successors, (233), 103 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:52,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 233 transitions. [2021-05-03 14:32:52,724 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 233 transitions. Word has length 17 [2021-05-03 14:32:52,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:52,724 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 233 transitions. [2021-05-03 14:32:52,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:52,724 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 233 transitions. [2021-05-03 14:32:52,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:52,725 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:52,725 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:52,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-05-03 14:32:52,925 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:52,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:52,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1516230378, now seen corresponding path program 112 times [2021-05-03 14:32:52,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:52,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625527259] [2021-05-03 14:32:52,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:53,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625527259] [2021-05-03 14:32:53,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492466495] [2021-05-03 14:32:53,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:53,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:53,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:53,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:53,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:53,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:53,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:53,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191015635] [2021-05-03 14:32:53,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:53,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:53,245 INFO L87 Difference]: Start difference. First operand 104 states and 233 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:53,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:53,692 INFO L93 Difference]: Finished difference Result 136 states and 284 transitions. [2021-05-03 14:32:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:32:53,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:53,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:53,696 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:32:53,697 INFO L226 Difference]: Without dead ends: 134 [2021-05-03 14:32:53,697 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 474.9ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:32:53,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-03 14:32:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-05-03 14:32:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2524271844660193) internal successors, (232), 103 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 232 transitions. [2021-05-03 14:32:53,699 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 232 transitions. Word has length 17 [2021-05-03 14:32:53,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:53,699 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 232 transitions. [2021-05-03 14:32:53,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 232 transitions. [2021-05-03 14:32:53,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:53,700 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:53,700 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:53,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-05-03 14:32:53,929 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:53,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1254677194, now seen corresponding path program 113 times [2021-05-03 14:32:53,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:53,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168788940] [2021-05-03 14:32:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:54,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168788940] [2021-05-03 14:32:54,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326416026] [2021-05-03 14:32:54,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:54,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:32:54,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:54,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:54,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:54,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:54,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:54,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:54,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:54,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:54,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:54,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:54,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:54,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:54,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:54,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:54,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:54,240 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:54,293 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:32:54,294 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:54,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:32:54,296 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:32:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:54,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:54,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:54,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550111686] [2021-05-03 14:32:54,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:54,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:54,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:54,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:54,342 INFO L87 Difference]: Start difference. First operand 104 states and 232 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:54,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:54,873 INFO L93 Difference]: Finished difference Result 139 states and 290 transitions. [2021-05-03 14:32:54,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:32:54,874 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:54,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:54,874 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:32:54,875 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:32:54,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 504.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:54,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:32:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 103. [2021-05-03 14:32:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2549019607843137) internal successors, (230), 102 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 230 transitions. [2021-05-03 14:32:54,877 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 230 transitions. Word has length 17 [2021-05-03 14:32:54,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:54,878 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 230 transitions. [2021-05-03 14:32:54,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 230 transitions. [2021-05-03 14:32:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:54,878 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:54,878 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:55,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:55,079 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:55,079 INFO L82 PathProgramCache]: Analyzing trace with hash -978374800, now seen corresponding path program 114 times [2021-05-03 14:32:55,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:55,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226582506] [2021-05-03 14:32:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:55,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226582506] [2021-05-03 14:32:55,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846609380] [2021-05-03 14:32:55,223 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:55,251 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:32:55,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:55,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:55,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:55,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:55,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:55,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:55,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676119267] [2021-05-03 14:32:55,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:55,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:55,428 INFO L87 Difference]: Start difference. First operand 103 states and 230 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:55,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:55,844 INFO L93 Difference]: Finished difference Result 114 states and 246 transitions. [2021-05-03 14:32:55,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:55,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:55,845 INFO L225 Difference]: With dead ends: 114 [2021-05-03 14:32:55,845 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 14:32:55,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:32:55,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 14:32:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2021-05-03 14:32:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2450980392156863) internal successors, (229), 102 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 229 transitions. [2021-05-03 14:32:55,847 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 229 transitions. Word has length 17 [2021-05-03 14:32:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:55,847 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 229 transitions. [2021-05-03 14:32:55,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 229 transitions. [2021-05-03 14:32:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:55,847 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:55,847 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:56,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:56,048 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:56,048 INFO L82 PathProgramCache]: Analyzing trace with hash -891493566, now seen corresponding path program 115 times [2021-05-03 14:32:56,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:56,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004468625] [2021-05-03 14:32:56,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:56,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:56,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004468625] [2021-05-03 14:32:56,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260746661] [2021-05-03 14:32:56,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:56,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:56,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:56,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:56,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:56,325 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:56,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:56,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:56,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:56,354 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:32:56,355 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:56,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:32:56,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:32:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:56,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:56,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941958657] [2021-05-03 14:32:56,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:56,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:56,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:56,384 INFO L87 Difference]: Start difference. First operand 103 states and 229 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:56,716 INFO L93 Difference]: Finished difference Result 126 states and 271 transitions. [2021-05-03 14:32:56,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:32:56,717 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:56,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:56,717 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:32:56,717 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:32:56,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 394.1ms TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:32:56,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:32:56,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 102. [2021-05-03 14:32:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.2475247524752477) internal successors, (227), 101 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 227 transitions. [2021-05-03 14:32:56,721 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 227 transitions. Word has length 17 [2021-05-03 14:32:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:56,721 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 227 transitions. [2021-05-03 14:32:56,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 227 transitions. [2021-05-03 14:32:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:56,722 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:56,722 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:56,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-05-03 14:32:56,937 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:56,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:56,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1484721066, now seen corresponding path program 116 times [2021-05-03 14:32:56,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:56,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542931976] [2021-05-03 14:32:56,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:56,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:57,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542931976] [2021-05-03 14:32:57,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347499219] [2021-05-03 14:32:57,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:57,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:32:57,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:57,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:57,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:57,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:57,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:57,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:57,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799682943] [2021-05-03 14:32:57,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:57,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:57,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:57,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:57,192 INFO L87 Difference]: Start difference. First operand 102 states and 227 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:57,412 INFO L93 Difference]: Finished difference Result 111 states and 240 transitions. [2021-05-03 14:32:57,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:57,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:57,413 INFO L225 Difference]: With dead ends: 111 [2021-05-03 14:32:57,413 INFO L226 Difference]: Without dead ends: 105 [2021-05-03 14:32:57,413 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:32:57,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-03 14:32:57,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2021-05-03 14:32:57,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.237623762376238) internal successors, (226), 101 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 226 transitions. [2021-05-03 14:32:57,415 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 226 transitions. Word has length 17 [2021-05-03 14:32:57,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:57,415 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 226 transitions. [2021-05-03 14:32:57,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:57,415 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 226 transitions. [2021-05-03 14:32:57,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:57,415 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:57,415 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:57,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:57,616 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1296689610, now seen corresponding path program 117 times [2021-05-03 14:32:57,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:57,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318632921] [2021-05-03 14:32:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:57,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318632921] [2021-05-03 14:32:57,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608144859] [2021-05-03 14:32:57,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:57,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:32:57,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:57,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:32:57,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:57,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:57,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:57,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:57,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:57,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:57,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:32:57,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:57,857 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-05-03 14:32:57,858 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:57,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:32:57,859 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:32:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:57,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:57,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:32:57,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607816301] [2021-05-03 14:32:57,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:57,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:57,883 INFO L87 Difference]: Start difference. First operand 102 states and 226 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:58,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:58,009 INFO L93 Difference]: Finished difference Result 114 states and 247 transitions. [2021-05-03 14:32:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:58,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:58,010 INFO L225 Difference]: With dead ends: 114 [2021-05-03 14:32:58,010 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 14:32:58,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:58,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 14:32:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-05-03 14:32:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2291666666666665) internal successors, (214), 96 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 214 transitions. [2021-05-03 14:32:58,012 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 214 transitions. Word has length 17 [2021-05-03 14:32:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:58,012 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 214 transitions. [2021-05-03 14:32:58,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 214 transitions. [2021-05-03 14:32:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:58,012 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:58,012 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:58,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-05-03 14:32:58,213 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:58,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:58,213 INFO L82 PathProgramCache]: Analyzing trace with hash -960002918, now seen corresponding path program 118 times [2021-05-03 14:32:58,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:58,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596805030] [2021-05-03 14:32:58,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:58,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596805030] [2021-05-03 14:32:58,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094123310] [2021-05-03 14:32:58,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:58,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:32:58,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:58,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:58,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:58,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:58,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:58,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:58,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156101551] [2021-05-03 14:32:58,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:58,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:58,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:58,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:58,489 INFO L87 Difference]: Start difference. First operand 97 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:58,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:58,748 INFO L93 Difference]: Finished difference Result 110 states and 234 transitions. [2021-05-03 14:32:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:58,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:58,749 INFO L225 Difference]: With dead ends: 110 [2021-05-03 14:32:58,749 INFO L226 Difference]: Without dead ends: 101 [2021-05-03 14:32:58,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:32:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-03 14:32:58,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2021-05-03 14:32:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.21875) internal successors, (213), 96 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 213 transitions. [2021-05-03 14:32:58,750 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 213 transitions. Word has length 17 [2021-05-03 14:32:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:58,750 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 213 transitions. [2021-05-03 14:32:58,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:58,751 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 213 transitions. [2021-05-03 14:32:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:58,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:58,751 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:58,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-05-03 14:32:58,952 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1409778866, now seen corresponding path program 119 times [2021-05-03 14:32:58,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:58,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568973340] [2021-05-03 14:32:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:59,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568973340] [2021-05-03 14:32:59,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563185472] [2021-05-03 14:32:59,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:32:59,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:32:59,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:59,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:59,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:59,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:59,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:32:59,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:59,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:32:59,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:32:59,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:32:59,246 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:32:59,246 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:32:59,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:32:59,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:32:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:59,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:59,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:32:59,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953427023] [2021-05-03 14:32:59,271 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:32:59,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:59,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:32:59,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:59,271 INFO L87 Difference]: Start difference. First operand 97 states and 213 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:32:59,421 INFO L93 Difference]: Finished difference Result 109 states and 237 transitions. [2021-05-03 14:32:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:32:59,422 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:32:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:32:59,422 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:32:59,422 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:32:59,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 175.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:32:59,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:32:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 97. [2021-05-03 14:32:59,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.21875) internal successors, (213), 96 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:59,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 213 transitions. [2021-05-03 14:32:59,424 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 213 transitions. Word has length 17 [2021-05-03 14:32:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:32:59,424 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 213 transitions. [2021-05-03 14:32:59,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:32:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 213 transitions. [2021-05-03 14:32:59,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:32:59,425 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:32:59,425 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:32:59,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:59,626 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:32:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:32:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash -7649710, now seen corresponding path program 120 times [2021-05-03 14:32:59,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:32:59,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10695112] [2021-05-03 14:32:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:32:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:32:59,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:59,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10695112] [2021-05-03 14:32:59,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515649384] [2021-05-03 14:32:59,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:32:59,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:32:59,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:32:59,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:32:59,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:32:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:32:59,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:32:59,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:32:59,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570737188] [2021-05-03 14:32:59,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:32:59,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:32:59,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:32:59,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:32:59,954 INFO L87 Difference]: Start difference. First operand 97 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:00,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:00,287 INFO L93 Difference]: Finished difference Result 103 states and 220 transitions. [2021-05-03 14:33:00,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:00,287 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:00,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:00,288 INFO L225 Difference]: With dead ends: 103 [2021-05-03 14:33:00,288 INFO L226 Difference]: Without dead ends: 97 [2021-05-03 14:33:00,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:33:00,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-03 14:33:00,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-03 14:33:00,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:00,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-05-03 14:33:00,290 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 17 [2021-05-03 14:33:00,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:00,290 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-05-03 14:33:00,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:00,290 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-05-03 14:33:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:00,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:00,290 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:00,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable640,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:00,491 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:00,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1640409374, now seen corresponding path program 121 times [2021-05-03 14:33:00,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:00,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325548249] [2021-05-03 14:33:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:00,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325548249] [2021-05-03 14:33:00,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360558029] [2021-05-03 14:33:00,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:00,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:00,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:00,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:00,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:00,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:00,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:00,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:00,798 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:00,817 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:33:00,817 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:00,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:00,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:33:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:00,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:00,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:33:00,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246439420] [2021-05-03 14:33:00,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:33:00,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:33:00,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:00,838 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:01,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:01,198 INFO L93 Difference]: Finished difference Result 121 states and 260 transitions. [2021-05-03 14:33:01,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:01,198 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:01,199 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:33:01,199 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:33:01,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:33:01,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:33:01,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-05-03 14:33:01,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.2083333333333335) internal successors, (212), 96 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 212 transitions. [2021-05-03 14:33:01,201 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 212 transitions. Word has length 17 [2021-05-03 14:33:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:01,201 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 212 transitions. [2021-05-03 14:33:01,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 212 transitions. [2021-05-03 14:33:01,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:01,201 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:01,201 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:01,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-05-03 14:33:01,405 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:01,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:01,406 INFO L82 PathProgramCache]: Analyzing trace with hash 854355354, now seen corresponding path program 122 times [2021-05-03 14:33:01,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:01,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205887410] [2021-05-03 14:33:01,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:01,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205887410] [2021-05-03 14:33:01,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889172268] [2021-05-03 14:33:01,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:01,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:01,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:01,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:01,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:01,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:01,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212020627] [2021-05-03 14:33:01,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:01,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:01,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:01,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:01,788 INFO L87 Difference]: Start difference. First operand 97 states and 212 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:02,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:02,245 INFO L93 Difference]: Finished difference Result 124 states and 257 transitions. [2021-05-03 14:33:02,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:02,246 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:02,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:02,246 INFO L225 Difference]: With dead ends: 124 [2021-05-03 14:33:02,246 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:33:02,247 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 539.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:33:02,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:33:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-05-03 14:33:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.217821782178218) internal successors, (224), 101 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 224 transitions. [2021-05-03 14:33:02,248 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 224 transitions. Word has length 17 [2021-05-03 14:33:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:02,249 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 224 transitions. [2021-05-03 14:33:02,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 224 transitions. [2021-05-03 14:33:02,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:02,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:02,249 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:02,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:02,453 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:02,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:02,453 INFO L82 PathProgramCache]: Analyzing trace with hash 630423886, now seen corresponding path program 123 times [2021-05-03 14:33:02,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:02,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405298701] [2021-05-03 14:33:02,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:02,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405298701] [2021-05-03 14:33:02,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821065203] [2021-05-03 14:33:02,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:02,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:33:02,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:02,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:02,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:02,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:02,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:02,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:02,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:02,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:02,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:02,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:02,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:02,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:02,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:02,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:02,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:02,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:02,756 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:02,800 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:33:02,800 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:02,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:02,802 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:02,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:02,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:33:02,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42771461] [2021-05-03 14:33:02,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:33:02,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:33:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:02,851 INFO L87 Difference]: Start difference. First operand 102 states and 224 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:03,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:03,455 INFO L93 Difference]: Finished difference Result 142 states and 295 transitions. [2021-05-03 14:33:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:33:03,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:03,456 INFO L225 Difference]: With dead ends: 142 [2021-05-03 14:33:03,456 INFO L226 Difference]: Without dead ends: 142 [2021-05-03 14:33:03,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 551.1ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:33:03,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-03 14:33:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 102. [2021-05-03 14:33:03,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.217821782178218) internal successors, (224), 101 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 224 transitions. [2021-05-03 14:33:03,458 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 224 transitions. Word has length 17 [2021-05-03 14:33:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:03,459 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 224 transitions. [2021-05-03 14:33:03,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:03,459 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 224 transitions. [2021-05-03 14:33:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:03,459 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:03,459 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:03,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable658,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:03,665 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:03,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:03,665 INFO L82 PathProgramCache]: Analyzing trace with hash -780366946, now seen corresponding path program 124 times [2021-05-03 14:33:03,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:03,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406560671] [2021-05-03 14:33:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:03,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:03,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406560671] [2021-05-03 14:33:03,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629406996] [2021-05-03 14:33:03,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:03,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:03,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:03,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:03,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:03,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:03,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:03,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:03,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:03,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:03,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:03,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:03,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:03,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:03,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:03,920 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:03,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:03,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:03,924 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:03,966 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:33:03,966 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:03,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:03,967 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:04,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:04,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:04,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742437101] [2021-05-03 14:33:04,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:04,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:04,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:04,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:04,003 INFO L87 Difference]: Start difference. First operand 102 states and 224 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:04,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:04,343 INFO L93 Difference]: Finished difference Result 119 states and 254 transitions. [2021-05-03 14:33:04,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:04,344 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:04,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:04,344 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:33:04,344 INFO L226 Difference]: Without dead ends: 117 [2021-05-03 14:33:04,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 359.3ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:33:04,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-03 14:33:04,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2021-05-03 14:33:04,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.207920792079208) internal successors, (223), 101 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 223 transitions. [2021-05-03 14:33:04,346 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 223 transitions. Word has length 17 [2021-05-03 14:33:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:04,346 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 223 transitions. [2021-05-03 14:33:04,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 223 transitions. [2021-05-03 14:33:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:04,346 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:04,346 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:04,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable668 [2021-05-03 14:33:04,547 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:04,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:04,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1990540626, now seen corresponding path program 125 times [2021-05-03 14:33:04,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:04,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988873894] [2021-05-03 14:33:04,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:04,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988873894] [2021-05-03 14:33:04,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933059291] [2021-05-03 14:33:04,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:04,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:33:04,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:04,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:04,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:04,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424598594] [2021-05-03 14:33:04,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:04,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:04,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:04,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:04,882 INFO L87 Difference]: Start difference. First operand 102 states and 223 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:05,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:05,184 INFO L93 Difference]: Finished difference Result 107 states and 232 transitions. [2021-05-03 14:33:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:33:05,185 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:05,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:05,186 INFO L225 Difference]: With dead ends: 107 [2021-05-03 14:33:05,186 INFO L226 Difference]: Without dead ends: 107 [2021-05-03 14:33:05,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-03 14:33:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 95. [2021-05-03 14:33:05,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.2127659574468086) internal successors, (208), 94 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:05,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 208 transitions. [2021-05-03 14:33:05,187 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 208 transitions. Word has length 17 [2021-05-03 14:33:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:05,187 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 208 transitions. [2021-05-03 14:33:05,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:05,188 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 208 transitions. [2021-05-03 14:33:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:05,188 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:05,188 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:05,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-05-03 14:33:05,389 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:05,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:05,390 INFO L82 PathProgramCache]: Analyzing trace with hash -893447990, now seen corresponding path program 126 times [2021-05-03 14:33:05,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:05,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783476103] [2021-05-03 14:33:05,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:05,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:05,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783476103] [2021-05-03 14:33:05,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232053790] [2021-05-03 14:33:05,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:05,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-03 14:33:05,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:05,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:05,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:05,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:05,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:05,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697880766] [2021-05-03 14:33:05,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:05,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:05,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:05,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:05,655 INFO L87 Difference]: Start difference. First operand 95 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:05,925 INFO L93 Difference]: Finished difference Result 101 states and 215 transitions. [2021-05-03 14:33:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:05,926 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:05,926 INFO L225 Difference]: With dead ends: 101 [2021-05-03 14:33:05,926 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 14:33:05,926 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 326.1ms TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:05,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 14:33:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-03 14:33:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:05,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-05-03 14:33:05,928 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-05-03 14:33:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:05,928 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-05-03 14:33:05,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-05-03 14:33:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:05,928 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:05,928 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:06,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:06,129 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash 754611094, now seen corresponding path program 127 times [2021-05-03 14:33:06,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:06,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205712615] [2021-05-03 14:33:06,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:06,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205712615] [2021-05-03 14:33:06,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265535901] [2021-05-03 14:33:06,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:06,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:06,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:06,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:06,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:06,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:06,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:06,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:06,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:06,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:06,416 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:33:06,417 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:06,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:06,418 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:33:06,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:06,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:06,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:06,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090501090] [2021-05-03 14:33:06,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:06,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:06,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:06,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:06,426 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:06,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:06,617 INFO L93 Difference]: Finished difference Result 113 states and 243 transitions. [2021-05-03 14:33:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:33:06,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:06,618 INFO L225 Difference]: With dead ends: 113 [2021-05-03 14:33:06,618 INFO L226 Difference]: Without dead ends: 113 [2021-05-03 14:33:06,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:33:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-03 14:33:06,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2021-05-03 14:33:06,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-05-03 14:33:06,620 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-05-03 14:33:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:06,620 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-05-03 14:33:06,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-05-03 14:33:06,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:06,621 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:06,621 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:06,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-05-03 14:33:06,822 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:06,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:06,822 INFO L82 PathProgramCache]: Analyzing trace with hash -255374394, now seen corresponding path program 128 times [2021-05-03 14:33:06,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:06,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137949127] [2021-05-03 14:33:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:06,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:06,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137949127] [2021-05-03 14:33:06,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454314875] [2021-05-03 14:33:06,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:06,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:06,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:06,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:06,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:07,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:07,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:07,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:07,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:07,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:07,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:07,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:07,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:07,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:07,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:07,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:07,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:07,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:07,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:07,157 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:07,200 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:33:07,200 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:07,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:07,202 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:07,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:07,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:33:07,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289739554] [2021-05-03 14:33:07,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:33:07,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:07,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:33:07,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:07,249 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:07,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:07,654 INFO L93 Difference]: Finished difference Result 138 states and 285 transitions. [2021-05-03 14:33:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:07,655 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:07,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:07,656 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:33:07,656 INFO L226 Difference]: Without dead ends: 138 [2021-05-03 14:33:07,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:33:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-03 14:33:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 95. [2021-05-03 14:33:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.202127659574468) internal successors, (207), 94 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 207 transitions. [2021-05-03 14:33:07,657 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 207 transitions. Word has length 17 [2021-05-03 14:33:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:07,657 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 207 transitions. [2021-05-03 14:33:07,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 207 transitions. [2021-05-03 14:33:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:07,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:07,658 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:07,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable699 [2021-05-03 14:33:07,873 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:07,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1666165226, now seen corresponding path program 129 times [2021-05-03 14:33:07,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:07,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934294838] [2021-05-03 14:33:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:07,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:07,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934294838] [2021-05-03 14:33:07,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581335605] [2021-05-03 14:33:07,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:07,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:33:07,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:07,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:33:07,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:08,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:08,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:08,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:08,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:08,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:08,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:08,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:33:08,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:08,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:08,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:08,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:33:08,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:08,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:08,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:08,094 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:08,151 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-05-03 14:33:08,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:08,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:33:08,157 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:08,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:08,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:08,182 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:33:08,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:08,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:08,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:08,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101408475] [2021-05-03 14:33:08,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:08,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:08,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:08,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:08,228 INFO L87 Difference]: Start difference. First operand 95 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:08,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:08,538 INFO L93 Difference]: Finished difference Result 115 states and 244 transitions. [2021-05-03 14:33:08,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:08,538 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:08,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:08,539 INFO L225 Difference]: With dead ends: 115 [2021-05-03 14:33:08,539 INFO L226 Difference]: Without dead ends: 113 [2021-05-03 14:33:08,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:33:08,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-03 14:33:08,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2021-05-03 14:33:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-05-03 14:33:08,540 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-05-03 14:33:08,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:08,540 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-05-03 14:33:08,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:08,540 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-05-03 14:33:08,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:08,541 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:08,541 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:08,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-05-03 14:33:08,741 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:08,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2138227046, now seen corresponding path program 130 times [2021-05-03 14:33:08,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:08,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530829597] [2021-05-03 14:33:08,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:08,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530829597] [2021-05-03 14:33:08,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759004280] [2021-05-03 14:33:08,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:08,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:08,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:08,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:08,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:09,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:09,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:09,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604794835] [2021-05-03 14:33:09,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:09,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:09,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:09,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:09,026 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:09,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:09,192 INFO L93 Difference]: Finished difference Result 132 states and 268 transitions. [2021-05-03 14:33:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:09,193 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:09,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:09,193 INFO L225 Difference]: With dead ends: 132 [2021-05-03 14:33:09,194 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 14:33:09,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 164.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:09,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 14:33:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2021-05-03 14:33:09,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.207920792079208) internal successors, (223), 101 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 223 transitions. [2021-05-03 14:33:09,195 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 223 transitions. Word has length 17 [2021-05-03 14:33:09,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:09,195 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 223 transitions. [2021-05-03 14:33:09,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:09,196 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 223 transitions. [2021-05-03 14:33:09,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:09,196 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:09,196 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:09,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:09,397 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1712089544, now seen corresponding path program 131 times [2021-05-03 14:33:09,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:09,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022282349] [2021-05-03 14:33:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:09,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022282349] [2021-05-03 14:33:09,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933722990] [2021-05-03 14:33:09,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:09,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:33:09,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:09,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:09,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:09,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:09,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:09,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:09,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:09,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:09,725 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:33:09,726 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:09,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:33:09,729 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:09,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:09,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_104 vanished before elimination [2021-05-03 14:33:09,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:09,745 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:09,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:09,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:33:09,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289955872] [2021-05-03 14:33:09,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:33:09,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:09,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:33:09,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:09,788 INFO L87 Difference]: Start difference. First operand 102 states and 223 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:10,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:10,075 INFO L93 Difference]: Finished difference Result 127 states and 266 transitions. [2021-05-03 14:33:10,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:10,076 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:10,076 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:33:10,076 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:33:10,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:33:10,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2021-05-03 14:33:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.207920792079208) internal successors, (223), 101 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:10,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 223 transitions. [2021-05-03 14:33:10,078 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 223 transitions. Word has length 17 [2021-05-03 14:33:10,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:10,078 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 223 transitions. [2021-05-03 14:33:10,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 223 transitions. [2021-05-03 14:33:10,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:10,078 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:10,078 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:10,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:10,279 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:10,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:10,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1002041774, now seen corresponding path program 132 times [2021-05-03 14:33:10,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:10,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393873916] [2021-05-03 14:33:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:10,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393873916] [2021-05-03 14:33:10,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119744878] [2021-05-03 14:33:10,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:10,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:33:10,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:10,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:10,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:10,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:10,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510012653] [2021-05-03 14:33:10,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:10,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:10,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:10,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:10,563 INFO L87 Difference]: Start difference. First operand 102 states and 223 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:10,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:10,730 INFO L93 Difference]: Finished difference Result 137 states and 280 transitions. [2021-05-03 14:33:10,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:10,731 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:10,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:10,731 INFO L225 Difference]: With dead ends: 137 [2021-05-03 14:33:10,731 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:33:10,732 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:10,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:33:10,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2021-05-03 14:33:10,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.21) internal successors, (221), 100 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:10,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 221 transitions. [2021-05-03 14:33:10,733 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 221 transitions. Word has length 17 [2021-05-03 14:33:10,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:10,733 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 221 transitions. [2021-05-03 14:33:10,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 221 transitions. [2021-05-03 14:33:10,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:10,734 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:10,734 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:10,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable735 [2021-05-03 14:33:10,934 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:10,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:10,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1059873528, now seen corresponding path program 133 times [2021-05-03 14:33:10,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:10,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452778338] [2021-05-03 14:33:10,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:11,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:11,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452778338] [2021-05-03 14:33:11,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887315579] [2021-05-03 14:33:11,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:11,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:11,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:11,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:11,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:11,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944817556] [2021-05-03 14:33:11,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:11,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:11,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:11,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:11,229 INFO L87 Difference]: Start difference. First operand 101 states and 221 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:11,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:11,502 INFO L93 Difference]: Finished difference Result 105 states and 225 transitions. [2021-05-03 14:33:11,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:33:11,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:11,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:11,504 INFO L225 Difference]: With dead ends: 105 [2021-05-03 14:33:11,504 INFO L226 Difference]: Without dead ends: 101 [2021-05-03 14:33:11,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:33:11,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-03 14:33:11,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-03 14:33:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.2) internal successors, (220), 100 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 220 transitions. [2021-05-03 14:33:11,505 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 220 transitions. Word has length 17 [2021-05-03 14:33:11,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:11,505 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 220 transitions. [2021-05-03 14:33:11,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 220 transitions. [2021-05-03 14:33:11,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:11,506 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:11,506 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:11,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:11,707 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:11,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:11,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1146754762, now seen corresponding path program 134 times [2021-05-03 14:33:11,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:11,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813333481] [2021-05-03 14:33:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:11,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813333481] [2021-05-03 14:33:11,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459873960] [2021-05-03 14:33:11,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:11,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:11,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:11,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:11,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:11,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:11,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:11,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457272211] [2021-05-03 14:33:11,972 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:11,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:11,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:11,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:11,972 INFO L87 Difference]: Start difference. First operand 101 states and 220 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:12,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:12,146 INFO L93 Difference]: Finished difference Result 112 states and 238 transitions. [2021-05-03 14:33:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:12,147 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:12,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:12,147 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:33:12,147 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 14:33:12,148 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 14:33:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 95. [2021-05-03 14:33:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:12,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-05-03 14:33:12,149 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-05-03 14:33:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:12,149 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-05-03 14:33:12,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:12,149 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-05-03 14:33:12,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:12,150 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:12,150 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:12,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-05-03 14:33:12,353 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:12,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:12,353 INFO L82 PathProgramCache]: Analyzing trace with hash -935331810, now seen corresponding path program 135 times [2021-05-03 14:33:12,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:12,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194954799] [2021-05-03 14:33:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:12,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194954799] [2021-05-03 14:33:12,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104805454] [2021-05-03 14:33:12,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:12,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:33:12,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:12,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:12,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:12,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:12,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:12,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:12,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:12,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:12,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:12,622 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:33:12,623 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:12,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:12,624 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:33:12,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:12,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:12,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:12,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278091668] [2021-05-03 14:33:12,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:12,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:12,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:12,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:12,630 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:12,804 INFO L93 Difference]: Finished difference Result 113 states and 242 transitions. [2021-05-03 14:33:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:12,805 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:12,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:12,806 INFO L225 Difference]: With dead ends: 113 [2021-05-03 14:33:12,806 INFO L226 Difference]: Without dead ends: 113 [2021-05-03 14:33:12,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:33:12,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-03 14:33:12,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 95. [2021-05-03 14:33:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-05-03 14:33:12,807 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-05-03 14:33:12,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:12,807 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-05-03 14:33:12,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:12,808 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-05-03 14:33:12,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:12,808 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:12,808 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:13,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable756 [2021-05-03 14:33:13,009 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:13,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1721385830, now seen corresponding path program 136 times [2021-05-03 14:33:13,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:13,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84687827] [2021-05-03 14:33:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:13,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84687827] [2021-05-03 14:33:13,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646755825] [2021-05-03 14:33:13,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:13,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:13,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:13,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:13,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:13,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:13,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:13,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477565478] [2021-05-03 14:33:13,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:13,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:13,297 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:13,624 INFO L93 Difference]: Finished difference Result 118 states and 243 transitions. [2021-05-03 14:33:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:13,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:13,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:13,625 INFO L225 Difference]: With dead ends: 118 [2021-05-03 14:33:13,625 INFO L226 Difference]: Without dead ends: 115 [2021-05-03 14:33:13,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 357.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:13,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-03 14:33:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2021-05-03 14:33:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 217 transitions. [2021-05-03 14:33:13,627 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 217 transitions. Word has length 17 [2021-05-03 14:33:13,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:13,627 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 217 transitions. [2021-05-03 14:33:13,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:13,627 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 217 transitions. [2021-05-03 14:33:13,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:13,627 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:13,627 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:13,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable760 [2021-05-03 14:33:13,828 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:13,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1295248328, now seen corresponding path program 137 times [2021-05-03 14:33:13,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:13,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282485826] [2021-05-03 14:33:13,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:13,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:13,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282485826] [2021-05-03 14:33:13,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981861402] [2021-05-03 14:33:13,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:13,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:33:13,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:13,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:13,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:14,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:14,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:14,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:14,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:14,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:14,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:14,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:14,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:14,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:14,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:14,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:14,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:14,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:14,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:14,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:14,138 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:33:14,139 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:14,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:14,140 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:14,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:14,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:33:14,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493963171] [2021-05-03 14:33:14,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:33:14,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:14,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:33:14,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:14,201 INFO L87 Difference]: Start difference. First operand 100 states and 217 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:14,438 INFO L93 Difference]: Finished difference Result 131 states and 280 transitions. [2021-05-03 14:33:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:14,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:14,439 INFO L225 Difference]: With dead ends: 131 [2021-05-03 14:33:14,439 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 14:33:14,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:14,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 14:33:14,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 100. [2021-05-03 14:33:14,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:14,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 217 transitions. [2021-05-03 14:33:14,441 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 217 transitions. Word has length 17 [2021-05-03 14:33:14,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:14,441 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 217 transitions. [2021-05-03 14:33:14,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:14,441 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 217 transitions. [2021-05-03 14:33:14,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:14,442 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:14,442 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:14,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable770 [2021-05-03 14:33:14,642 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:14,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:14,643 INFO L82 PathProgramCache]: Analyzing trace with hash -585200558, now seen corresponding path program 138 times [2021-05-03 14:33:14,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:14,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862787261] [2021-05-03 14:33:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:14,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:14,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862787261] [2021-05-03 14:33:14,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105779377] [2021-05-03 14:33:14,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:14,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:33:14,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:14,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:14,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:14,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:14,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562015129] [2021-05-03 14:33:14,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:14,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:14,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:14,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:14,908 INFO L87 Difference]: Start difference. First operand 100 states and 217 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:15,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:15,128 INFO L93 Difference]: Finished difference Result 103 states and 222 transitions. [2021-05-03 14:33:15,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:15,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:15,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:15,130 INFO L225 Difference]: With dead ends: 103 [2021-05-03 14:33:15,130 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:33:15,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:33:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:33:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2021-05-03 14:33:15,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:15,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-05-03 14:33:15,131 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-05-03 14:33:15,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:15,131 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-05-03 14:33:15,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:15,131 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-05-03 14:33:15,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:15,131 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:15,131 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:15,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:15,332 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:15,333 INFO L82 PathProgramCache]: Analyzing trace with hash 892934848, now seen corresponding path program 139 times [2021-05-03 14:33:15,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:15,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368831873] [2021-05-03 14:33:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:15,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:15,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368831873] [2021-05-03 14:33:15,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353047179] [2021-05-03 14:33:15,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:15,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:15,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:15,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:15,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:15,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:15,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:15,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:15,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:15,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:15,642 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:33:15,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:33:15,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:15,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:15,665 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:15,665 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-05-03 14:33:15,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:15,666 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:15,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:15,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:33:15,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558376973] [2021-05-03 14:33:15,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:33:15,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:15,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:33:15,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:15,714 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:16,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:16,045 INFO L93 Difference]: Finished difference Result 123 states and 254 transitions. [2021-05-03 14:33:16,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:16,046 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:16,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:16,046 INFO L225 Difference]: With dead ends: 123 [2021-05-03 14:33:16,046 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:33:16,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:16,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:33:16,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-05-03 14:33:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.193548387096774) internal successors, (204), 93 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 204 transitions. [2021-05-03 14:33:16,048 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 204 transitions. Word has length 17 [2021-05-03 14:33:16,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:16,048 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 204 transitions. [2021-05-03 14:33:16,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 204 transitions. [2021-05-03 14:33:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:16,049 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:16,049 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:16,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:16,262 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:16,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:16,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1602982618, now seen corresponding path program 140 times [2021-05-03 14:33:16,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:16,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793200928] [2021-05-03 14:33:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:16,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793200928] [2021-05-03 14:33:16,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3750825] [2021-05-03 14:33:16,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:16,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:16,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:16,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:16,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:16,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:16,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:16,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091014486] [2021-05-03 14:33:16,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:16,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:16,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:16,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:16,548 INFO L87 Difference]: Start difference. First operand 94 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:16,843 INFO L93 Difference]: Finished difference Result 144 states and 291 transitions. [2021-05-03 14:33:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:16,844 INFO L225 Difference]: With dead ends: 144 [2021-05-03 14:33:16,844 INFO L226 Difference]: Without dead ends: 144 [2021-05-03 14:33:16,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 305.0ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:16,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-03 14:33:16,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 95. [2021-05-03 14:33:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.223404255319149) internal successors, (209), 94 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 209 transitions. [2021-05-03 14:33:16,846 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 209 transitions. Word has length 17 [2021-05-03 14:33:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:16,847 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 209 transitions. [2021-05-03 14:33:16,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 209 transitions. [2021-05-03 14:33:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:16,847 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:16,847 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:17,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:17,061 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:17,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash -630069376, now seen corresponding path program 141 times [2021-05-03 14:33:17,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:17,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61923973] [2021-05-03 14:33:17,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:17,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61923973] [2021-05-03 14:33:17,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050847360] [2021-05-03 14:33:17,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:17,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-03 14:33:17,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:17,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:17,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:17,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:17,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752763442] [2021-05-03 14:33:17,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:17,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:17,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:17,321 INFO L87 Difference]: Start difference. First operand 95 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:17,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:17,625 INFO L93 Difference]: Finished difference Result 99 states and 213 transitions. [2021-05-03 14:33:17,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:17,626 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:17,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:17,626 INFO L225 Difference]: With dead ends: 99 [2021-05-03 14:33:17,627 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 14:33:17,627 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 346.0ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 14:33:17,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-03 14:33:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.2127659574468086) internal successors, (208), 94 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 208 transitions. [2021-05-03 14:33:17,628 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 208 transitions. Word has length 17 [2021-05-03 14:33:17,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:17,628 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 208 transitions. [2021-05-03 14:33:17,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:17,628 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 208 transitions. [2021-05-03 14:33:17,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:17,629 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:17,629 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:17,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable811 [2021-05-03 14:33:17,845 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash -543188142, now seen corresponding path program 142 times [2021-05-03 14:33:17,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:17,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120366615] [2021-05-03 14:33:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:17,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120366615] [2021-05-03 14:33:17,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888621970] [2021-05-03 14:33:17,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:17,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:17,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:17,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:18,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:18,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:18,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526871839] [2021-05-03 14:33:18,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:18,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:18,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:18,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:18,094 INFO L87 Difference]: Start difference. First operand 95 states and 208 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:18,281 INFO L93 Difference]: Finished difference Result 109 states and 231 transitions. [2021-05-03 14:33:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:33:18,282 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:18,282 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:33:18,282 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:33:18,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:18,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:33:18,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 91. [2021-05-03 14:33:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.188888888888889) internal successors, (197), 90 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 197 transitions. [2021-05-03 14:33:18,284 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 197 transitions. Word has length 17 [2021-05-03 14:33:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:18,284 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 197 transitions. [2021-05-03 14:33:18,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 197 transitions. [2021-05-03 14:33:18,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:18,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:18,285 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:18,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:18,501 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:18,501 INFO L82 PathProgramCache]: Analyzing trace with hash -419000934, now seen corresponding path program 143 times [2021-05-03 14:33:18,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:18,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995175393] [2021-05-03 14:33:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:18,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995175393] [2021-05-03 14:33:18,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235591618] [2021-05-03 14:33:18,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:18,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:33:18,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:18,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:18,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:18,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:18,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93421417] [2021-05-03 14:33:18,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:18,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:18,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:18,819 INFO L87 Difference]: Start difference. First operand 91 states and 197 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:19,229 INFO L93 Difference]: Finished difference Result 126 states and 254 transitions. [2021-05-03 14:33:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:19,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:19,230 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:33:19,230 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:33:19,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 409.2ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:33:19,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:33:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2021-05-03 14:33:19,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1979166666666665) internal successors, (211), 96 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:19,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 211 transitions. [2021-05-03 14:33:19,232 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 211 transitions. Word has length 17 [2021-05-03 14:33:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:19,232 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 211 transitions. [2021-05-03 14:33:19,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 211 transitions. [2021-05-03 14:33:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:19,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:19,232 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:19,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable820,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:19,433 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:19,433 INFO L82 PathProgramCache]: Analyzing trace with hash 7136568, now seen corresponding path program 144 times [2021-05-03 14:33:19,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:19,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614814146] [2021-05-03 14:33:19,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614814146] [2021-05-03 14:33:19,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414688029] [2021-05-03 14:33:19,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:19,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:33:19,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:19,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:19,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:19,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:19,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:19,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:19,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:19,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:19,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:19,824 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:33:19,824 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:19,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:33:19,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:19,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:19,847 INFO L518 ElimStorePlain]: Eliminatee v_prenex_112 vanished before elimination [2021-05-03 14:33:19,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:19,849 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:19,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:19,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:19,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130937011] [2021-05-03 14:33:19,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:19,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:19,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:19,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:19,884 INFO L87 Difference]: Start difference. First operand 97 states and 211 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:20,277 INFO L93 Difference]: Finished difference Result 129 states and 265 transitions. [2021-05-03 14:33:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:33:20,278 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:20,278 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:33:20,278 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 14:33:20,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 451.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:20,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 14:33:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 96. [2021-05-03 14:33:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 95 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:20,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 207 transitions. [2021-05-03 14:33:20,280 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 207 transitions. Word has length 17 [2021-05-03 14:33:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:20,280 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 207 transitions. [2021-05-03 14:33:20,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 207 transitions. [2021-05-03 14:33:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:20,280 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:20,280 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:20,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-05-03 14:33:20,485 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash 717184338, now seen corresponding path program 145 times [2021-05-03 14:33:20,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:20,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673921231] [2021-05-03 14:33:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:20,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:20,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673921231] [2021-05-03 14:33:20,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871220345] [2021-05-03 14:33:20,568 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:20,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:20,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:20,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:20,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841149326] [2021-05-03 14:33:20,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:20,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:20,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:20,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:20,798 INFO L87 Difference]: Start difference. First operand 96 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:21,266 INFO L93 Difference]: Finished difference Result 128 states and 259 transitions. [2021-05-03 14:33:21,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:33:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:21,267 INFO L225 Difference]: With dead ends: 128 [2021-05-03 14:33:21,267 INFO L226 Difference]: Without dead ends: 128 [2021-05-03 14:33:21,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:33:21,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-03 14:33:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 95. [2021-05-03 14:33:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1808510638297873) internal successors, (205), 94 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 205 transitions. [2021-05-03 14:33:21,269 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 205 transitions. Word has length 17 [2021-05-03 14:33:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:21,269 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 205 transitions. [2021-05-03 14:33:21,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 205 transitions. [2021-05-03 14:33:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:21,269 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:21,269 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:21,470 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:21,470 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:21,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:21,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1515867656, now seen corresponding path program 146 times [2021-05-03 14:33:21,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:21,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555250633] [2021-05-03 14:33:21,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:21,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555250633] [2021-05-03 14:33:21,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983944748] [2021-05-03 14:33:21,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:21,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:21,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:21,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:21,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:21,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695874851] [2021-05-03 14:33:21,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:21,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:21,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:21,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:21,745 INFO L87 Difference]: Start difference. First operand 95 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:22,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:22,193 INFO L93 Difference]: Finished difference Result 103 states and 215 transitions. [2021-05-03 14:33:22,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:22,194 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:22,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:22,194 INFO L225 Difference]: With dead ends: 103 [2021-05-03 14:33:22,194 INFO L226 Difference]: Without dead ends: 99 [2021-05-03 14:33:22,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 483.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:33:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-03 14:33:22,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-05-03 14:33:22,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1702127659574466) internal successors, (204), 94 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 204 transitions. [2021-05-03 14:33:22,196 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 204 transitions. Word has length 17 [2021-05-03 14:33:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:22,197 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 204 transitions. [2021-05-03 14:33:22,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 204 transitions. [2021-05-03 14:33:22,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:22,197 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:22,197 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:22,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable848 [2021-05-03 14:33:22,401 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:22,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:22,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1428986422, now seen corresponding path program 147 times [2021-05-03 14:33:22,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:22,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722700445] [2021-05-03 14:33:22,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:22,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:22,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722700445] [2021-05-03 14:33:22,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526252643] [2021-05-03 14:33:22,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:22,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:33:22,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:22,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:33:22,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:22,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:22,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:22,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:22,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:22,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:22,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:22,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:22,696 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:33:22,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:22,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:33:22,701 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:22,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:22,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:22,711 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:33:22,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:22,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:22,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:33:22,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234533786] [2021-05-03 14:33:22,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:33:22,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:22,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:33:22,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:22,736 INFO L87 Difference]: Start difference. First operand 95 states and 204 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:23,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:23,096 INFO L93 Difference]: Finished difference Result 115 states and 240 transitions. [2021-05-03 14:33:23,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:23,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:23,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:23,096 INFO L225 Difference]: With dead ends: 115 [2021-05-03 14:33:23,097 INFO L226 Difference]: Without dead ends: 115 [2021-05-03 14:33:23,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 408.9ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:33:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-03 14:33:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2021-05-03 14:33:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.172043010752688) internal successors, (202), 93 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 202 transitions. [2021-05-03 14:33:23,098 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 202 transitions. Word has length 17 [2021-05-03 14:33:23,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:23,098 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 202 transitions. [2021-05-03 14:33:23,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 202 transitions. [2021-05-03 14:33:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:23,098 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:23,098 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:23,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable853,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:23,299 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:23,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:23,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2022213922, now seen corresponding path program 148 times [2021-05-03 14:33:23,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:23,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909826421] [2021-05-03 14:33:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:23,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:23,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909826421] [2021-05-03 14:33:23,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291790848] [2021-05-03 14:33:23,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:23,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:23,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:23,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:23,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:23,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:23,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:23,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:23,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789401576] [2021-05-03 14:33:23,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:23,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:23,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:23,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:23,575 INFO L87 Difference]: Start difference. First operand 94 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:23,894 INFO L93 Difference]: Finished difference Result 100 states and 209 transitions. [2021-05-03 14:33:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:23,894 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:23,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:23,895 INFO L225 Difference]: With dead ends: 100 [2021-05-03 14:33:23,895 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:33:23,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:33:23,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:33:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-03 14:33:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:23,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-05-03 14:33:23,896 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 17 [2021-05-03 14:33:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:23,897 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-05-03 14:33:23,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:23,897 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-05-03 14:33:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:23,897 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:23,897 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:24,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-05-03 14:33:24,098 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash 759196754, now seen corresponding path program 149 times [2021-05-03 14:33:24,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:24,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130009240] [2021-05-03 14:33:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:24,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:24,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130009240] [2021-05-03 14:33:24,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468020425] [2021-05-03 14:33:24,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:24,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:33:24,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:24,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:24,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:24,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:24,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:24,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117904706] [2021-05-03 14:33:24,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:24,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:24,350 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:24,499 INFO L93 Difference]: Finished difference Result 103 states and 216 transitions. [2021-05-03 14:33:24,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:24,500 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:24,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:24,500 INFO L225 Difference]: With dead ends: 103 [2021-05-03 14:33:24,500 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:33:24,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:33:24,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 86. [2021-05-03 14:33:24,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1411764705882352) internal successors, (182), 85 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:24,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 182 transitions. [2021-05-03 14:33:24,502 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 182 transitions. Word has length 17 [2021-05-03 14:33:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:24,502 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 182 transitions. [2021-05-03 14:33:24,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 182 transitions. [2021-05-03 14:33:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:24,502 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:24,502 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:24,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-05-03 14:33:24,703 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:24,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:24,704 INFO L82 PathProgramCache]: Analyzing trace with hash 2086701778, now seen corresponding path program 150 times [2021-05-03 14:33:24,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:24,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007942005] [2021-05-03 14:33:24,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:24,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007942005] [2021-05-03 14:33:24,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114050898] [2021-05-03 14:33:24,802 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:24,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:33:24,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:24,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:24,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:24,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:24,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:24,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:24,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:24,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:24,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:24,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:24,961 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:33:24,962 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:24,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:24,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:33:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:24,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:24,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:24,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606555691] [2021-05-03 14:33:24,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:24,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:24,981 INFO L87 Difference]: Start difference. First operand 86 states and 182 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:25,216 INFO L93 Difference]: Finished difference Result 134 states and 274 transitions. [2021-05-03 14:33:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:25,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:25,217 INFO L225 Difference]: With dead ends: 134 [2021-05-03 14:33:25,217 INFO L226 Difference]: Without dead ends: 134 [2021-05-03 14:33:25,217 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:33:25,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-03 14:33:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 91. [2021-05-03 14:33:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.2) internal successors, (198), 90 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 198 transitions. [2021-05-03 14:33:25,219 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 198 transitions. Word has length 17 [2021-05-03 14:33:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:25,219 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 198 transitions. [2021-05-03 14:33:25,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:25,219 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 198 transitions. [2021-05-03 14:33:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:25,219 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:25,220 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:25,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable865 [2021-05-03 14:33:25,420 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1862770310, now seen corresponding path program 151 times [2021-05-03 14:33:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:25,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601302086] [2021-05-03 14:33:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:33:25,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601302086] [2021-05-03 14:33:25,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025364181] [2021-05-03 14:33:25,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:25,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:33:25,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:25,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:25,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:25,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:33:25,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:25,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:25,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:25,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:25,745 INFO L628 ElimStorePlain]: treesize reduction 82, result has 35.4 percent of original size [2021-05-03 14:33:25,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:33:25,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:25,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:25,771 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:25,771 INFO L518 ElimStorePlain]: Eliminatee v_prenex_117 vanished before elimination [2021-05-03 14:33:25,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:25,773 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:33:25,825 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:33:25,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:25,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:33:25,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917411213] [2021-05-03 14:33:25,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:33:25,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:25,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:33:25,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:33:25,827 INFO L87 Difference]: Start difference. First operand 91 states and 198 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:25,970 INFO L93 Difference]: Finished difference Result 94 states and 197 transitions. [2021-05-03 14:33:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:33:25,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:25,971 INFO L225 Difference]: With dead ends: 94 [2021-05-03 14:33:25,971 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:33:25,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:33:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2021-05-03 14:33:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1294117647058823) internal successors, (181), 85 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 181 transitions. [2021-05-03 14:33:25,972 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 181 transitions. Word has length 17 [2021-05-03 14:33:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:25,973 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 181 transitions. [2021-05-03 14:33:25,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 181 transitions. [2021-05-03 14:33:25,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:25,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:25,973 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:26,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-05-03 14:33:26,174 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1300647758, now seen corresponding path program 152 times [2021-05-03 14:33:26,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:26,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850972005] [2021-05-03 14:33:26,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:26,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850972005] [2021-05-03 14:33:26,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424572977] [2021-05-03 14:33:26,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:26,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:26,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:26,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:33:26,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:26,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:26,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:26,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:26,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:26,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:26,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:26,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:26,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:26,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:26,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:26,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:33:26,405 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:26,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:26,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:33:26,410 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:26,467 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-05-03 14:33:26,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:26,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:33:26,473 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:26,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:26,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:26,497 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-05-03 14:33:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:26,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:26,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:26,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658127598] [2021-05-03 14:33:26,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:26,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:26,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:26,541 INFO L87 Difference]: Start difference. First operand 86 states and 181 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:26,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:26,884 INFO L93 Difference]: Finished difference Result 115 states and 229 transitions. [2021-05-03 14:33:26,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:33:26,884 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:26,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:26,885 INFO L225 Difference]: With dead ends: 115 [2021-05-03 14:33:26,885 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 14:33:26,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:26,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 14:33:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 90. [2021-05-03 14:33:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 89 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 189 transitions. [2021-05-03 14:33:26,886 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 189 transitions. Word has length 17 [2021-05-03 14:33:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:26,887 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 189 transitions. [2021-05-03 14:33:26,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 189 transitions. [2021-05-03 14:33:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:26,887 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:26,887 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:27,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable875,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:27,088 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1726785260, now seen corresponding path program 153 times [2021-05-03 14:33:27,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:27,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900976201] [2021-05-03 14:33:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:27,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900976201] [2021-05-03 14:33:27,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871268103] [2021-05-03 14:33:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:27,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:33:27,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:33:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:27,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:27,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:27,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:33:27,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:27,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:27,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:27,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:33:27,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:27,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:27,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:27,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:27,301 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:27,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:27,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:27,306 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:27,361 INFO L628 ElimStorePlain]: treesize reduction 83, result has 31.4 percent of original size [2021-05-03 14:33:27,362 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:27,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:27,364 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:33:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:27,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:27,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:27,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383559450] [2021-05-03 14:33:27,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:27,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:27,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:27,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:27,417 INFO L87 Difference]: Start difference. First operand 90 states and 189 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:27,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:27,715 INFO L93 Difference]: Finished difference Result 129 states and 268 transitions. [2021-05-03 14:33:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:33:27,716 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:27,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:27,716 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:33:27,716 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 14:33:27,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 14:33:27,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2021-05-03 14:33:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.1235955056179776) internal successors, (189), 89 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 189 transitions. [2021-05-03 14:33:27,718 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 189 transitions. Word has length 17 [2021-05-03 14:33:27,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:27,718 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 189 transitions. [2021-05-03 14:33:27,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:27,718 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 189 transitions. [2021-05-03 14:33:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:27,718 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:27,718 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:27,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:27,919 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:27,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:27,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1858134266, now seen corresponding path program 154 times [2021-05-03 14:33:27,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:27,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751415403] [2021-05-03 14:33:27,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:28,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751415403] [2021-05-03 14:33:28,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146922465] [2021-05-03 14:33:28,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:28,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:28,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:28,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:28,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:28,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:28,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:28,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300443407] [2021-05-03 14:33:28,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:28,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:28,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:28,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:28,178 INFO L87 Difference]: Start difference. First operand 90 states and 189 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:28,444 INFO L93 Difference]: Finished difference Result 100 states and 208 transitions. [2021-05-03 14:33:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:28,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:28,445 INFO L225 Difference]: With dead ends: 100 [2021-05-03 14:33:28,446 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 14:33:28,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 274.6ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:28,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 14:33:28,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2021-05-03 14:33:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.1204819277108435) internal successors, (176), 83 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:28,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 176 transitions. [2021-05-03 14:33:28,447 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 176 transitions. Word has length 17 [2021-05-03 14:33:28,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:28,447 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 176 transitions. [2021-05-03 14:33:28,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:28,447 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 176 transitions. [2021-05-03 14:33:28,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:28,448 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:28,448 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:28,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable883 [2021-05-03 14:33:28,648 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash -806136362, now seen corresponding path program 155 times [2021-05-03 14:33:28,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:28,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538991835] [2021-05-03 14:33:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:28,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538991835] [2021-05-03 14:33:28,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64163468] [2021-05-03 14:33:28,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:28,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:33:28,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:28,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:28,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:28,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:28,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:28,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542040598] [2021-05-03 14:33:28,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:28,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:28,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:28,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:28,925 INFO L87 Difference]: Start difference. First operand 84 states and 176 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:29,253 INFO L93 Difference]: Finished difference Result 127 states and 250 transitions. [2021-05-03 14:33:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:33:29,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:29,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:29,254 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:33:29,254 INFO L226 Difference]: Without dead ends: 124 [2021-05-03 14:33:29,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 317.7ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:29,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-03 14:33:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 89. [2021-05-03 14:33:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.125) internal successors, (187), 88 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:29,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 187 transitions. [2021-05-03 14:33:29,256 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 187 transitions. Word has length 17 [2021-05-03 14:33:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:29,256 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 187 transitions. [2021-05-03 14:33:29,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 187 transitions. [2021-05-03 14:33:29,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:29,257 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:29,257 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:29,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable893,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:29,458 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:29,458 INFO L82 PathProgramCache]: Analyzing trace with hash -379998860, now seen corresponding path program 156 times [2021-05-03 14:33:29,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:29,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183318671] [2021-05-03 14:33:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:29,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:29,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183318671] [2021-05-03 14:33:29,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987754626] [2021-05-03 14:33:29,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:29,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:33:29,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:29,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:29,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:29,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:29,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:29,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:29,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:29,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:33:29,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:29,828 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:33:29,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:33:29,834 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:29,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:29,853 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:29,853 INFO L518 ElimStorePlain]: Eliminatee v_prenex_120 vanished before elimination [2021-05-03 14:33:29,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:29,855 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:29,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:29,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:29,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:29,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972499179] [2021-05-03 14:33:29,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:29,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:29,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:29,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:29,903 INFO L87 Difference]: Start difference. First operand 89 states and 187 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:30,291 INFO L93 Difference]: Finished difference Result 121 states and 240 transitions. [2021-05-03 14:33:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:30,292 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:33:30,292 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:33:30,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:33:30,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:33:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 87. [2021-05-03 14:33:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-05-03 14:33:30,294 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 17 [2021-05-03 14:33:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:30,294 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-05-03 14:33:30,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:30,294 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-05-03 14:33:30,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:30,294 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:30,294 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:30,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable904,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:30,495 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:30,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:30,495 INFO L82 PathProgramCache]: Analyzing trace with hash 330048910, now seen corresponding path program 157 times [2021-05-03 14:33:30,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:30,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036666231] [2021-05-03 14:33:30,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:30,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036666231] [2021-05-03 14:33:30,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578308890] [2021-05-03 14:33:30,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:30,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:30,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:30,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:30,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:30,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:30,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522608852] [2021-05-03 14:33:30,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:30,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:30,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:30,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:30,777 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:31,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:31,075 INFO L93 Difference]: Finished difference Result 131 states and 257 transitions. [2021-05-03 14:33:31,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:33:31,076 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:31,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:31,076 INFO L225 Difference]: With dead ends: 131 [2021-05-03 14:33:31,076 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 14:33:31,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 14:33:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-05-03 14:33:31,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:31,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 177 transitions. [2021-05-03 14:33:31,078 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 177 transitions. Word has length 17 [2021-05-03 14:33:31,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:31,078 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 177 transitions. [2021-05-03 14:33:31,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 177 transitions. [2021-05-03 14:33:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:31,079 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:31,079 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:31,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:31,279 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:31,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:31,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1903003084, now seen corresponding path program 158 times [2021-05-03 14:33:31,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:31,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749939630] [2021-05-03 14:33:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:31,371 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:31,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749939630] [2021-05-03 14:33:31,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159027795] [2021-05-03 14:33:31,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:31,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:31,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:31,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:33:31,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:31,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:31,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:31,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066247057] [2021-05-03 14:33:31,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:31,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:31,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:31,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:31,534 INFO L87 Difference]: Start difference. First operand 86 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:31,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:31,786 INFO L93 Difference]: Finished difference Result 93 states and 187 transitions. [2021-05-03 14:33:31,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:31,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:31,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:31,787 INFO L225 Difference]: With dead ends: 93 [2021-05-03 14:33:31,787 INFO L226 Difference]: Without dead ends: 89 [2021-05-03 14:33:31,787 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:33:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-03 14:33:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2021-05-03 14:33:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-05-03 14:33:31,788 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 17 [2021-05-03 14:33:31,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:31,789 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-05-03 14:33:31,789 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-05-03 14:33:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:31,789 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:31,789 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:31,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-05-03 14:33:31,997 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:31,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1816121850, now seen corresponding path program 159 times [2021-05-03 14:33:31,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:31,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545943202] [2021-05-03 14:33:31,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:32,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545943202] [2021-05-03 14:33:32,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370126805] [2021-05-03 14:33:32,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:32,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:33:32,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:32,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:32,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:32,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:32,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:32,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929842830] [2021-05-03 14:33:32,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:32,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:32,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:32,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:32,236 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:32,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:32,421 INFO L93 Difference]: Finished difference Result 104 states and 210 transitions. [2021-05-03 14:33:32,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:32,421 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:32,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:32,422 INFO L225 Difference]: With dead ends: 104 [2021-05-03 14:33:32,422 INFO L226 Difference]: Without dead ends: 104 [2021-05-03 14:33:32,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-03 14:33:32,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2021-05-03 14:33:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-05-03 14:33:32,423 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-05-03 14:33:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:32,423 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-05-03 14:33:32,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-05-03 14:33:32,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:32,423 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:32,423 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:32,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable925,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:32,624 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:32,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:32,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1691934642, now seen corresponding path program 160 times [2021-05-03 14:33:32,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:32,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126266505] [2021-05-03 14:33:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:32,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126266505] [2021-05-03 14:33:32,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373468416] [2021-05-03 14:33:32,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:32,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:32,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:32,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:32,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:32,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:32,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:32,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024015670] [2021-05-03 14:33:32,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:32,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:32,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:32,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:32,933 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:33,127 INFO L93 Difference]: Finished difference Result 112 states and 217 transitions. [2021-05-03 14:33:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:33,128 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:33,128 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:33:33,128 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:33:33,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:33:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2021-05-03 14:33:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1149425287356323) internal successors, (184), 87 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 184 transitions. [2021-05-03 14:33:33,130 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 184 transitions. Word has length 17 [2021-05-03 14:33:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:33,130 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 184 transitions. [2021-05-03 14:33:33,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 184 transitions. [2021-05-03 14:33:33,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:33,130 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:33,130 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:33,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:33,331 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:33,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1915866110, now seen corresponding path program 161 times [2021-05-03 14:33:33,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:33,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626265078] [2021-05-03 14:33:33,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:33,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:33,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626265078] [2021-05-03 14:33:33,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838686445] [2021-05-03 14:33:33,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:33,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:33:33,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:33,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:33,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:33,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:33,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:33,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:33,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:33,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:33,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:33,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:33,671 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:33:33,671 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:33,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:33:33,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:33,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:33,695 INFO L518 ElimStorePlain]: Eliminatee v_prenex_125 vanished before elimination [2021-05-03 14:33:33,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:33,696 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:33,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:33,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:33,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824188769] [2021-05-03 14:33:33,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:33,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:33,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:33,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:33,751 INFO L87 Difference]: Start difference. First operand 88 states and 184 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:34,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:34,191 INFO L93 Difference]: Finished difference Result 109 states and 216 transitions. [2021-05-03 14:33:34,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:34,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:34,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:34,192 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:33:34,192 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:33:34,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:34,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:33:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2021-05-03 14:33:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.1149425287356323) internal successors, (184), 87 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 184 transitions. [2021-05-03 14:33:34,194 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 184 transitions. Word has length 17 [2021-05-03 14:33:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:34,194 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 184 transitions. [2021-05-03 14:33:34,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 184 transitions. [2021-05-03 14:33:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:34,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:34,194 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:34,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable940,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:34,395 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:34,395 INFO L82 PathProgramCache]: Analyzing trace with hash 968310354, now seen corresponding path program 162 times [2021-05-03 14:33:34,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:34,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673442090] [2021-05-03 14:33:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:34,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673442090] [2021-05-03 14:33:34,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559189224] [2021-05-03 14:33:34,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:34,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:33:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:33:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:34,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:34,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:34,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:33:34,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:34,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:34,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:34,721 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:34,792 INFO L628 ElimStorePlain]: treesize reduction 74, result has 42.6 percent of original size [2021-05-03 14:33:34,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:34,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:33:34,799 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:34,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:34,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:33:34,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:34,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:34,851 INFO L518 ElimStorePlain]: Eliminatee v_prenex_128 vanished before elimination [2021-05-03 14:33:34,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:34,853 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:33:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:34,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:34,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:34,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248261676] [2021-05-03 14:33:34,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:34,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:34,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:34,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:34,896 INFO L87 Difference]: Start difference. First operand 88 states and 184 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:35,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:35,211 INFO L93 Difference]: Finished difference Result 111 states and 217 transitions. [2021-05-03 14:33:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:33:35,212 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:35,212 INFO L225 Difference]: With dead ends: 111 [2021-05-03 14:33:35,212 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:33:35,213 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:33:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2021-05-03 14:33:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.103448275862069) internal successors, (183), 87 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 183 transitions. [2021-05-03 14:33:35,214 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 183 transitions. Word has length 17 [2021-05-03 14:33:35,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:35,214 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 183 transitions. [2021-05-03 14:33:35,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:35,214 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 183 transitions. [2021-05-03 14:33:35,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:35,214 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:35,215 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:35,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:35,415 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash -555749370, now seen corresponding path program 163 times [2021-05-03 14:33:35,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:35,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173264301] [2021-05-03 14:33:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:35,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173264301] [2021-05-03 14:33:35,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844353202] [2021-05-03 14:33:35,523 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:35,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:35,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:35,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:35,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:35,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:35,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474366695] [2021-05-03 14:33:35,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:35,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:35,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:35,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:35,747 INFO L87 Difference]: Start difference. First operand 88 states and 183 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:35,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:35,997 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-05-03 14:33:35,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:35,998 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:35,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:35,999 INFO L225 Difference]: With dead ends: 112 [2021-05-03 14:33:35,999 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 14:33:35,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:35,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 14:33:36,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 87. [2021-05-03 14:33:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.104651162790698) internal successors, (181), 86 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 181 transitions. [2021-05-03 14:33:36,001 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 181 transitions. Word has length 17 [2021-05-03 14:33:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:36,001 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 181 transitions. [2021-05-03 14:33:36,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:36,002 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 181 transitions. [2021-05-03 14:33:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:36,002 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:36,002 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:36,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-05-03 14:33:36,229 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:36,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:36,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1506165932, now seen corresponding path program 164 times [2021-05-03 14:33:36,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:36,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761204460] [2021-05-03 14:33:36,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:36,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761204460] [2021-05-03 14:33:36,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784593284] [2021-05-03 14:33:36,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:36,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:36,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:36,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:33:36,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:36,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:36,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:36,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392883712] [2021-05-03 14:33:36,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:36,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:36,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:36,540 INFO L87 Difference]: Start difference. First operand 87 states and 181 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:36,752 INFO L93 Difference]: Finished difference Result 95 states and 191 transitions. [2021-05-03 14:33:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:36,753 INFO L225 Difference]: With dead ends: 95 [2021-05-03 14:33:36,753 INFO L226 Difference]: Without dead ends: 91 [2021-05-03 14:33:36,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:36,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-05-03 14:33:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2021-05-03 14:33:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 86 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:36,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 180 transitions. [2021-05-03 14:33:36,755 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 180 transitions. Word has length 17 [2021-05-03 14:33:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:36,755 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 180 transitions. [2021-05-03 14:33:36,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:36,755 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 180 transitions. [2021-05-03 14:33:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:36,755 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:36,755 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:36,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable966,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:36,956 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:36,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1593047166, now seen corresponding path program 165 times [2021-05-03 14:33:36,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:36,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672424842] [2021-05-03 14:33:36,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:37,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672424842] [2021-05-03 14:33:37,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302646269] [2021-05-03 14:33:37,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:37,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:33:37,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:37,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:37,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:37,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:37,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:37,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997626627] [2021-05-03 14:33:37,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:37,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:37,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:37,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:37,237 INFO L87 Difference]: Start difference. First operand 87 states and 180 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:37,395 INFO L93 Difference]: Finished difference Result 107 states and 216 transitions. [2021-05-03 14:33:37,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:33:37,395 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:37,396 INFO L225 Difference]: With dead ends: 107 [2021-05-03 14:33:37,396 INFO L226 Difference]: Without dead ends: 107 [2021-05-03 14:33:37,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:37,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-03 14:33:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-05-03 14:33:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 178 transitions. [2021-05-03 14:33:37,397 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 178 transitions. Word has length 17 [2021-05-03 14:33:37,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:37,398 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 178 transitions. [2021-05-03 14:33:37,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 178 transitions. [2021-05-03 14:33:37,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:37,398 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:37,398 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:37,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable970,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:37,598 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:37,599 INFO L82 PathProgramCache]: Analyzing trace with hash 999819666, now seen corresponding path program 166 times [2021-05-03 14:33:37,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:37,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756707883] [2021-05-03 14:33:37,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:37,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756707883] [2021-05-03 14:33:37,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348432210] [2021-05-03 14:33:37,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:37,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:37,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:37,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:37,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:37,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472563275] [2021-05-03 14:33:37,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:37,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:37,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:37,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:37,862 INFO L87 Difference]: Start difference. First operand 86 states and 178 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:38,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:38,187 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-05-03 14:33:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:38,188 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:38,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:38,189 INFO L225 Difference]: With dead ends: 92 [2021-05-03 14:33:38,189 INFO L226 Difference]: Without dead ends: 86 [2021-05-03 14:33:38,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 334.5ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:33:38,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-03 14:33:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-03 14:33:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 177 transitions. [2021-05-03 14:33:38,190 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 177 transitions. Word has length 17 [2021-05-03 14:33:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:38,190 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 177 transitions. [2021-05-03 14:33:38,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 177 transitions. [2021-05-03 14:33:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:38,191 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:38,191 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:38,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable974 [2021-05-03 14:33:38,391 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:38,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:38,392 INFO L82 PathProgramCache]: Analyzing trace with hash -513736954, now seen corresponding path program 167 times [2021-05-03 14:33:38,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:38,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665723592] [2021-05-03 14:33:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:38,491 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:38,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665723592] [2021-05-03 14:33:38,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081694591] [2021-05-03 14:33:38,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:33:38,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:33:38,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:38,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:38,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:38,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:38,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:38,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253611382] [2021-05-03 14:33:38,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:38,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:38,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:38,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:38,694 INFO L87 Difference]: Start difference. First operand 86 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:38,843 INFO L93 Difference]: Finished difference Result 95 states and 192 transitions. [2021-05-03 14:33:38,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:38,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:38,845 INFO L225 Difference]: With dead ends: 95 [2021-05-03 14:33:38,845 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 14:33:38,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:38,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 14:33:38,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2021-05-03 14:33:38,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:38,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-05-03 14:33:38,847 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-05-03 14:33:38,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:38,847 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-05-03 14:33:38,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:38,847 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-05-03 14:33:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:38,847 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:38,847 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:39,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:39,048 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:39,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:39,049 INFO L82 PathProgramCache]: Analyzing trace with hash 68118298, now seen corresponding path program 168 times [2021-05-03 14:33:39,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:39,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159079734] [2021-05-03 14:33:39,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:39,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159079734] [2021-05-03 14:33:39,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379669156] [2021-05-03 14:33:39,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:39,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:33:39,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:39,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:39,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:39,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:39,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388364678] [2021-05-03 14:33:39,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:39,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:39,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:39,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:39,459 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:39,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:39,901 INFO L93 Difference]: Finished difference Result 127 states and 241 transitions. [2021-05-03 14:33:39,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:33:39,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:39,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:39,903 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:33:39,903 INFO L226 Difference]: Without dead ends: 124 [2021-05-03 14:33:39,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:33:39,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-03 14:33:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 85. [2021-05-03 14:33:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-05-03 14:33:39,905 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-05-03 14:33:39,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:39,905 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-05-03 14:33:39,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-05-03 14:33:39,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:39,905 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:39,906 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:40,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-05-03 14:33:40,121 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:40,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:40,121 INFO L82 PathProgramCache]: Analyzing trace with hash -155813170, now seen corresponding path program 169 times [2021-05-03 14:33:40,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:40,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336527614] [2021-05-03 14:33:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:40,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:40,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336527614] [2021-05-03 14:33:40,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54366972] [2021-05-03 14:33:40,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:40,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:40,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:40,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:40,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:40,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:40,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:33:40,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:40,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:40,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:40,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:40,614 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:33:40,615 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:40,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:33:40,621 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:40,644 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:40,644 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-05-03 14:33:40,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:40,648 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:33:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:40,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:40,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:33:40,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576915989] [2021-05-03 14:33:40,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:33:40,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:40,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:33:40,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:40,720 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:41,115 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-03 14:33:41,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:41,507 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-05-03 14:33:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:41,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:41,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:41,508 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:33:41,508 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:33:41,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 841.3ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:41,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:33:41,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-05-03 14:33:41,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:41,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-05-03 14:33:41,510 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-05-03 14:33:41,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:41,510 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-05-03 14:33:41,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:41,510 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-05-03 14:33:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:41,510 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:41,510 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:41,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable997 [2021-05-03 14:33:41,711 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:41,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:41,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1566604002, now seen corresponding path program 170 times [2021-05-03 14:33:41,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:41,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277651196] [2021-05-03 14:33:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:41,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:41,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277651196] [2021-05-03 14:33:41,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939210954] [2021-05-03 14:33:41,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:41,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:41,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:41,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:33:41,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:42,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:42,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:33:42,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:42,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:42,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:33:42,066 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:42,135 INFO L628 ElimStorePlain]: treesize reduction 76, result has 42.0 percent of original size [2021-05-03 14:33:42,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:42,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:33:42,142 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:42,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:42,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:33:42,172 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:42,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:42,194 INFO L518 ElimStorePlain]: Eliminatee v_prenex_138 vanished before elimination [2021-05-03 14:33:42,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:42,196 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:33:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:42,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:42,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:42,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023513002] [2021-05-03 14:33:42,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:42,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:42,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:42,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:42,240 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:42,598 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2021-05-03 14:33:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:42,697 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-05-03 14:33:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:33:42,698 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:42,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:42,698 INFO L225 Difference]: With dead ends: 111 [2021-05-03 14:33:42,698 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:33:42,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 497.2ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:33:42,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:33:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-05-03 14:33:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-05-03 14:33:42,699 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-05-03 14:33:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:42,700 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-05-03 14:33:42,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-05-03 14:33:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:42,700 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:42,700 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:42,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-05-03 14:33:42,901 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1204303570, now seen corresponding path program 171 times [2021-05-03 14:33:42,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:42,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662601154] [2021-05-03 14:33:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:42,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662601154] [2021-05-03 14:33:42,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211903633] [2021-05-03 14:33:42,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:43,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:33:43,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:43,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:43,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:43,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:43,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:43,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:43,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267988807] [2021-05-03 14:33:43,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:43,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:43,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:43,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:43,223 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:43,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:43,588 INFO L93 Difference]: Finished difference Result 123 states and 231 transitions. [2021-05-03 14:33:43,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:33:43,589 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:43,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:43,589 INFO L225 Difference]: With dead ends: 123 [2021-05-03 14:33:43,590 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:33:43,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:43,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:33:43,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2021-05-03 14:33:43,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:43,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-05-03 14:33:43,591 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-05-03 14:33:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:43,592 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-05-03 14:33:43,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-05-03 14:33:43,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:43,592 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:43,592 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:43,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1011 [2021-05-03 14:33:43,797 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:43,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:43,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1028748424, now seen corresponding path program 172 times [2021-05-03 14:33:43,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:43,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777190435] [2021-05-03 14:33:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:43,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:43,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777190435] [2021-05-03 14:33:43,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126865184] [2021-05-03 14:33:43,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:43,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:43,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:43,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:43,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:44,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:44,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:44,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201520858] [2021-05-03 14:33:44,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:44,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:44,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:44,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:44,161 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:44,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:44,801 INFO L93 Difference]: Finished difference Result 108 states and 206 transitions. [2021-05-03 14:33:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:44,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:44,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:44,802 INFO L225 Difference]: With dead ends: 108 [2021-05-03 14:33:44,802 INFO L226 Difference]: Without dead ends: 104 [2021-05-03 14:33:44,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 701.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:33:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-03 14:33:44,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-05-03 14:33:44,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:44,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-05-03 14:33:44,803 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-05-03 14:33:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:44,803 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-05-03 14:33:44,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:44,804 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-05-03 14:33:44,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:44,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:44,804 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:45,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-05-03 14:33:45,004 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:45,005 INFO L82 PathProgramCache]: Analyzing trace with hash -941867190, now seen corresponding path program 173 times [2021-05-03 14:33:45,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:45,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83128638] [2021-05-03 14:33:45,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:45,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83128638] [2021-05-03 14:33:45,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983824320] [2021-05-03 14:33:45,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:45,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:33:45,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:45,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:45,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:45,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:45,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:45,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116481943] [2021-05-03 14:33:45,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:45,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:45,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:45,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:45,294 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:45,499 INFO L93 Difference]: Finished difference Result 120 states and 231 transitions. [2021-05-03 14:33:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:45,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:45,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:45,499 INFO L225 Difference]: With dead ends: 120 [2021-05-03 14:33:45,499 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:33:45,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 256.0ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:33:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2021-05-03 14:33:45,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.073170731707317) internal successors, (170), 82 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 170 transitions. [2021-05-03 14:33:45,501 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 170 transitions. Word has length 17 [2021-05-03 14:33:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:45,501 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 170 transitions. [2021-05-03 14:33:45,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 170 transitions. [2021-05-03 14:33:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:45,501 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:45,501 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:45,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1028,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:45,705 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:45,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:45,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1535094690, now seen corresponding path program 174 times [2021-05-03 14:33:45,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:45,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602308460] [2021-05-03 14:33:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:45,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602308460] [2021-05-03 14:33:45,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710838403] [2021-05-03 14:33:45,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:45,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:33:45,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:45,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:45,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:46,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:46,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:46,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818683001] [2021-05-03 14:33:46,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:46,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:46,029 INFO L87 Difference]: Start difference. First operand 83 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:46,306 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2021-05-03 14:33:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:46,683 INFO L93 Difference]: Finished difference Result 109 states and 206 transitions. [2021-05-03 14:33:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:46,684 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:33:46,684 INFO L226 Difference]: Without dead ends: 103 [2021-05-03 14:33:46,684 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 694.4ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:33:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-03 14:33:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 83. [2021-05-03 14:33:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:46,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-05-03 14:33:46,686 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-05-03 14:33:46,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:46,686 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-05-03 14:33:46,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:46,686 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-05-03 14:33:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:46,686 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:46,686 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:46,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1032,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:46,887 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:46,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:46,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1246315986, now seen corresponding path program 175 times [2021-05-03 14:33:46,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:46,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560221225] [2021-05-03 14:33:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:46,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560221225] [2021-05-03 14:33:46,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300117701] [2021-05-03 14:33:46,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:46,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:46,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:47,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:47,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:47,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766360999] [2021-05-03 14:33:47,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:47,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:47,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:47,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:47,158 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:47,436 INFO L93 Difference]: Finished difference Result 129 states and 249 transitions. [2021-05-03 14:33:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:33:47,437 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:47,437 INFO L225 Difference]: With dead ends: 129 [2021-05-03 14:33:47,437 INFO L226 Difference]: Without dead ends: 129 [2021-05-03 14:33:47,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:33:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-03 14:33:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 82. [2021-05-03 14:33:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 81 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 167 transitions. [2021-05-03 14:33:47,439 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 167 transitions. Word has length 17 [2021-05-03 14:33:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:47,439 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 167 transitions. [2021-05-03 14:33:47,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:47,439 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 167 transitions. [2021-05-03 14:33:47,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:47,440 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:47,440 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:47,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1038 [2021-05-03 14:33:47,640 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash -494858892, now seen corresponding path program 176 times [2021-05-03 14:33:47,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:47,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763512337] [2021-05-03 14:33:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:47,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763512337] [2021-05-03 14:33:47,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409532473] [2021-05-03 14:33:47,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:47,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:47,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:47,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:33:47,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:47,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:47,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-03 14:33:47,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584782733] [2021-05-03 14:33:47,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:33:47,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:47,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:33:47,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:33:47,870 INFO L87 Difference]: Start difference. First operand 82 states and 167 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:48,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:48,284 INFO L93 Difference]: Finished difference Result 91 states and 179 transitions. [2021-05-03 14:33:48,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:48,285 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:48,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:48,285 INFO L225 Difference]: With dead ends: 91 [2021-05-03 14:33:48,285 INFO L226 Difference]: Without dead ends: 83 [2021-05-03 14:33:48,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 456.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:33:48,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-03 14:33:48,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2021-05-03 14:33:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 163 transitions. [2021-05-03 14:33:48,287 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 163 transitions. Word has length 17 [2021-05-03 14:33:48,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:48,287 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 163 transitions. [2021-05-03 14:33:48,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:48,287 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 163 transitions. [2021-05-03 14:33:48,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:33:48,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:48,287 INFO L551 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:48,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:48,488 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:48,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:48,488 INFO L82 PathProgramCache]: Analyzing trace with hash -82381434, now seen corresponding path program 177 times [2021-05-03 14:33:48,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:48,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999271861] [2021-05-03 14:33:48,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:48,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999271861] [2021-05-03 14:33:48,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921509870] [2021-05-03 14:33:48,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:48,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:33:48,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:48,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:33:48,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:48,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-05-03 14:33:48,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:48,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-05-03 14:33:48,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:48,726 INFO L628 ElimStorePlain]: treesize reduction 19, result has 38.7 percent of original size [2021-05-03 14:33:48,726 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:33:48,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:48,727 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:12 [2021-05-03 14:33:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:48,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:48,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-05-03 14:33:48,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9872881] [2021-05-03 14:33:48,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:33:48,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:48,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:33:48,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:33:48,764 INFO L87 Difference]: Start difference. First operand 80 states and 163 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:48,923 INFO L93 Difference]: Finished difference Result 95 states and 189 transitions. [2021-05-03 14:33:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:33:48,924 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:33:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:48,925 INFO L225 Difference]: With dead ends: 95 [2021-05-03 14:33:48,925 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 14:33:48,925 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:33:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 14:33:48,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 74. [2021-05-03 14:33:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 148 transitions. [2021-05-03 14:33:48,926 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 148 transitions. Word has length 17 [2021-05-03 14:33:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:48,926 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 148 transitions. [2021-05-03 14:33:48,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 148 transitions. [2021-05-03 14:33:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:48,926 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:48,926 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:49,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1047 [2021-05-03 14:33:49,127 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:49,127 INFO L82 PathProgramCache]: Analyzing trace with hash 413516902, now seen corresponding path program 178 times [2021-05-03 14:33:49,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:49,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160489123] [2021-05-03 14:33:49,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:49,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160489123] [2021-05-03 14:33:49,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547811572] [2021-05-03 14:33:49,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:49,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:49,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:49,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:33:49,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:49,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:49,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:49,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:49,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:49,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:49,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:49,656 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:49,689 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-05-03 14:33:49,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:49,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:33:49,694 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:49,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:49,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:49,706 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:33:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:49,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:49,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:33:49,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976042411] [2021-05-03 14:33:49,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:33:49,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:33:49,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:49,760 INFO L87 Difference]: Start difference. First operand 74 states and 148 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:50,227 INFO L93 Difference]: Finished difference Result 145 states and 273 transitions. [2021-05-03 14:33:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:50,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:50,228 INFO L225 Difference]: With dead ends: 145 [2021-05-03 14:33:50,228 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:33:50,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 626.5ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:33:50,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:33:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-05-03 14:33:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:50,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-05-03 14:33:50,229 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 18 [2021-05-03 14:33:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:50,230 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-05-03 14:33:50,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-05-03 14:33:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:50,230 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:50,230 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:50,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1049,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:50,430 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:50,431 INFO L82 PathProgramCache]: Analyzing trace with hash 293588210, now seen corresponding path program 179 times [2021-05-03 14:33:50,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:50,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895260659] [2021-05-03 14:33:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:50,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895260659] [2021-05-03 14:33:50,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678234734] [2021-05-03 14:33:50,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:50,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:33:50,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:50,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:33:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:50,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:50,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:50,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:51,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:51,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:51,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:51,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:51,054 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-05-03 14:33:51,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:51,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:33:51,061 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:51,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:51,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:51,077 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:33:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:51,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:51,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:33:51,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907552780] [2021-05-03 14:33:51,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:33:51,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:51,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:33:51,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:51,164 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:51,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:51,639 INFO L93 Difference]: Finished difference Result 141 states and 266 transitions. [2021-05-03 14:33:51,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:51,640 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:33:51,640 INFO L226 Difference]: Without dead ends: 122 [2021-05-03 14:33:51,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 660.2ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:33:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-03 14:33:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2021-05-03 14:33:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.026315789473684) internal successors, (154), 76 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 154 transitions. [2021-05-03 14:33:51,642 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 154 transitions. Word has length 18 [2021-05-03 14:33:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:51,642 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 154 transitions. [2021-05-03 14:33:51,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 154 transitions. [2021-05-03 14:33:51,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:51,642 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:51,642 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:51,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:51,843 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:51,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1245941418, now seen corresponding path program 180 times [2021-05-03 14:33:51,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:51,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835073999] [2021-05-03 14:33:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:52,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835073999] [2021-05-03 14:33:52,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935369754] [2021-05-03 14:33:52,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:52,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:33:52,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:33:52,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:52,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:52,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:52,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:52,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:52,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:52,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:52,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:52,475 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-05-03 14:33:52,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:52,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:33:52,481 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:52,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:52,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:52,493 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:33:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:52,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:52,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:33:52,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694271725] [2021-05-03 14:33:52,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:33:52,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:33:52,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:52,557 INFO L87 Difference]: Start difference. First operand 77 states and 154 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:52,989 INFO L93 Difference]: Finished difference Result 139 states and 263 transitions. [2021-05-03 14:33:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:52,990 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:33:52,991 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:33:52,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:33:52,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:33:52,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 78. [2021-05-03 14:33:52,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-05-03 14:33:52,992 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 18 [2021-05-03 14:33:52,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:52,992 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-05-03 14:33:52,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:52,992 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-05-03 14:33:52,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:52,992 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:52,992 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:53,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-05-03 14:33:53,193 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:53,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:53,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2107946482, now seen corresponding path program 181 times [2021-05-03 14:33:53,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:53,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102178807] [2021-05-03 14:33:53,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:53,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102178807] [2021-05-03 14:33:53,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151033387] [2021-05-03 14:33:53,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:53,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:33:53,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:53,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:53,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:53,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:33:53,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:53,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:53,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:33:53,857 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:53,890 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-05-03 14:33:53,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:53,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:33:53,896 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:53,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:53,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:53,910 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:33:53,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:53,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:53,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:33:53,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017295563] [2021-05-03 14:33:53,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:33:53,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:53,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:33:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:53,984 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:54,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:54,648 INFO L93 Difference]: Finished difference Result 153 states and 292 transitions. [2021-05-03 14:33:54,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:33:54,649 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:54,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:54,650 INFO L225 Difference]: With dead ends: 153 [2021-05-03 14:33:54,650 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 14:33:54,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 813.7ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:33:54,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 14:33:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2021-05-03 14:33:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.037974683544304) internal successors, (161), 79 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 161 transitions. [2021-05-03 14:33:54,651 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 161 transitions. Word has length 18 [2021-05-03 14:33:54,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:54,651 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 161 transitions. [2021-05-03 14:33:54,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:54,651 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 161 transitions. [2021-05-03 14:33:54,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:54,652 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:54,652 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:54,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:54,852 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:54,853 INFO L82 PathProgramCache]: Analyzing trace with hash -551383242, now seen corresponding path program 182 times [2021-05-03 14:33:54,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:54,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374409691] [2021-05-03 14:33:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:55,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:55,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374409691] [2021-05-03 14:33:55,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844324765] [2021-05-03 14:33:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:55,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:33:55,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:55,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:33:55,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:55,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:55,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:55,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:55,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:55,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:55,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:55,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:55,405 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-05-03 14:33:55,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:55,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:33:55,412 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:55,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:55,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:55,424 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:33:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:55,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:55,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:33:55,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174297682] [2021-05-03 14:33:55,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:33:55,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:55,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:33:55,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:55,486 INFO L87 Difference]: Start difference. First operand 80 states and 161 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:55,747 INFO L93 Difference]: Finished difference Result 119 states and 226 transitions. [2021-05-03 14:33:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:55,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:55,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:55,748 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:33:55,748 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 14:33:55,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 468.7ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:33:55,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 14:33:55,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2021-05-03 14:33:55,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.037037037037037) internal successors, (165), 81 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 165 transitions. [2021-05-03 14:33:55,749 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 165 transitions. Word has length 18 [2021-05-03 14:33:55,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:55,749 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 165 transitions. [2021-05-03 14:33:55,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 165 transitions. [2021-05-03 14:33:55,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:55,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:55,749 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:55,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:55,950 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:55,950 INFO L82 PathProgramCache]: Analyzing trace with hash 400969966, now seen corresponding path program 183 times [2021-05-03 14:33:55,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:55,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225259746] [2021-05-03 14:33:55,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:55,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:56,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225259746] [2021-05-03 14:33:56,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339107246] [2021-05-03 14:33:56,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:56,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:33:56,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:33:56,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:56,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:56,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:56,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:56,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:56,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:56,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:33:56,550 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:56,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:56,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:56,561 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-05-03 14:33:56,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:56,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:56,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:33:56,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646107272] [2021-05-03 14:33:56,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:33:56,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:56,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:33:56,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:56,620 INFO L87 Difference]: Start difference. First operand 82 states and 165 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:56,905 INFO L93 Difference]: Finished difference Result 117 states and 226 transitions. [2021-05-03 14:33:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:56,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:56,907 INFO L225 Difference]: With dead ends: 117 [2021-05-03 14:33:56,907 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 14:33:56,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 549.5ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:33:56,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 14:33:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2021-05-03 14:33:56,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:56,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-05-03 14:33:56,909 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 18 [2021-05-03 14:33:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:56,909 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-05-03 14:33:56,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-05-03 14:33:56,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:56,910 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:56,910 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:57,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-05-03 14:33:57,125 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:57,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1262975030, now seen corresponding path program 184 times [2021-05-03 14:33:57,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:57,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975553863] [2021-05-03 14:33:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:57,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975553863] [2021-05-03 14:33:57,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642877326] [2021-05-03 14:33:57,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:57,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:33:57,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:57,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:33:57,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:57,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:57,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:57,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:57,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:57,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:57,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:57,797 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:57,828 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-05-03 14:33:57,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:57,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:33:57,835 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:57,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:57,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:33:57,848 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:33:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:57,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:57,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:33:57,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176223609] [2021-05-03 14:33:57,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:33:57,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:57,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:33:57,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:57,910 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:33:58,276 INFO L93 Difference]: Finished difference Result 121 states and 231 transitions. [2021-05-03 14:33:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:33:58,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:33:58,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:33:58,277 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:33:58,277 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 14:33:58,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 630.9ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:33:58,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 14:33:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2021-05-03 14:33:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-05-03 14:33:58,279 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-05-03 14:33:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:33:58,279 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-05-03 14:33:58,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:33:58,279 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-05-03 14:33:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:33:58,279 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:33:58,279 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:33:58,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1072 [2021-05-03 14:33:58,480 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:33:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:33:58,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1895806994, now seen corresponding path program 185 times [2021-05-03 14:33:58,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:33:58,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986006195] [2021-05-03 14:33:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:33:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:33:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:58,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986006195] [2021-05-03 14:33:58,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486199584] [2021-05-03 14:33:58,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:33:58,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:33:58,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:33:58,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:33:58,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:33:59,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:59,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:59,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:59,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:59,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:59,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:59,287 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:59,416 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-05-03 14:33:59,416 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-05-03 14:33:59,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:59,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:33:59,429 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:59,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:59,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:59,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:33:59,485 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:33:59,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:59,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:33:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:33:59,538 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:33:59,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:33:59,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:33:59,582 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:33:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:33:59,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:33:59,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:33:59,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070619164] [2021-05-03 14:33:59,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:33:59,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:33:59,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:33:59,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:33:59,700 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:00,232 INFO L93 Difference]: Finished difference Result 146 states and 272 transitions. [2021-05-03 14:34:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:34:00,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:00,234 INFO L225 Difference]: With dead ends: 146 [2021-05-03 14:34:00,234 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:34:00,234 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 892.0ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:00,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:34:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 86. [2021-05-03 14:34:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-05-03 14:34:00,235 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-05-03 14:34:00,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:00,235 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-05-03 14:34:00,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-05-03 14:34:00,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:00,236 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:00,236 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:00,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:00,441 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:00,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:00,441 INFO L82 PathProgramCache]: Analyzing trace with hash -484828314, now seen corresponding path program 186 times [2021-05-03 14:34:00,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:00,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805154506] [2021-05-03 14:34:00,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:00,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805154506] [2021-05-03 14:34:00,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513065728] [2021-05-03 14:34:00,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:00,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:34:00,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:00,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:00,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:00,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:00,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:00,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:00,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:00,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:00,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:00,936 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:00,971 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-05-03 14:34:00,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:00,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:00,977 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:00,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:00,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:00,990 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:01,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:01,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:01,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:34:01,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246735609] [2021-05-03 14:34:01,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:34:01,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:01,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:34:01,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:34:01,055 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:01,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:01,483 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-05-03 14:34:01,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:34:01,484 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:01,484 INFO L225 Difference]: With dead ends: 124 [2021-05-03 14:34:01,484 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 14:34:01,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 525.1ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 14:34:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 90. [2021-05-03 14:34:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.067415730337079) internal successors, (184), 89 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 184 transitions. [2021-05-03 14:34:01,487 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 184 transitions. Word has length 18 [2021-05-03 14:34:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:01,487 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 184 transitions. [2021-05-03 14:34:01,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:01,487 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 184 transitions. [2021-05-03 14:34:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:01,487 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:01,487 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:01,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:01,697 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:01,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:01,697 INFO L82 PathProgramCache]: Analyzing trace with hash 377176750, now seen corresponding path program 187 times [2021-05-03 14:34:01,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:01,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499841193] [2021-05-03 14:34:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:01,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:01,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499841193] [2021-05-03 14:34:01,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955710848] [2021-05-03 14:34:01,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:01,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:01,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:02,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:02,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:02,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:02,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:02,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:02,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:02,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:02,260 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-05-03 14:34:02,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:02,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:02,270 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:02,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:02,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:02,282 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:02,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:02,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:34:02,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500960181] [2021-05-03 14:34:02,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:34:02,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:02,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:34:02,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:34:02,343 INFO L87 Difference]: Start difference. First operand 90 states and 184 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:02,985 INFO L93 Difference]: Finished difference Result 126 states and 248 transitions. [2021-05-03 14:34:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:34:02,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:02,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:02,986 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:34:02,986 INFO L226 Difference]: Without dead ends: 113 [2021-05-03 14:34:02,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 659.0ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:34:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-03 14:34:02,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2021-05-03 14:34:02,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.066666666666667) internal successors, (186), 90 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 186 transitions. [2021-05-03 14:34:02,989 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 186 transitions. Word has length 18 [2021-05-03 14:34:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:02,989 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 186 transitions. [2021-05-03 14:34:02,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 186 transitions. [2021-05-03 14:34:02,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:02,989 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:02,989 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:03,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1083,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:03,205 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:03,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1513362022, now seen corresponding path program 188 times [2021-05-03 14:34:03,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:03,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862372584] [2021-05-03 14:34:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:03,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862372584] [2021-05-03 14:34:03,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489260731] [2021-05-03 14:34:03,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:03,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:34:03,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:03,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:03,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:03,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:03,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:03,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:03,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:03,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:03,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:03,738 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:03,838 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-05-03 14:34:03,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:03,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:03,846 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:03,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:03,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:03,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:03,890 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:03,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:03,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:03,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:03,932 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:03,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:03,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:03,967 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:04,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:04,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:34:04,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044543454] [2021-05-03 14:34:04,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:34:04,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:04,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:34:04,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:34:04,089 INFO L87 Difference]: Start difference. First operand 91 states and 186 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:04,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:04,881 INFO L93 Difference]: Finished difference Result 146 states and 277 transitions. [2021-05-03 14:34:04,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:34:04,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:04,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:04,883 INFO L225 Difference]: With dead ends: 146 [2021-05-03 14:34:04,883 INFO L226 Difference]: Without dead ends: 127 [2021-05-03 14:34:04,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 897.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:34:04,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-03 14:34:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2021-05-03 14:34:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.067415730337079) internal successors, (184), 89 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 184 transitions. [2021-05-03 14:34:04,885 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 184 transitions. Word has length 18 [2021-05-03 14:34:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:04,885 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 184 transitions. [2021-05-03 14:34:04,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 184 transitions. [2021-05-03 14:34:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:04,885 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:04,885 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:05,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:05,086 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:05,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:05,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1729607370, now seen corresponding path program 189 times [2021-05-03 14:34:05,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:05,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281830502] [2021-05-03 14:34:05,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:05,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281830502] [2021-05-03 14:34:05,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096722208] [2021-05-03 14:34:05,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:05,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:34:05,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:05,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:05,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:05,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:05,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:05,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:05,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:05,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:05,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:05,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:05,645 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-05-03 14:34:05,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:05,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:05,651 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:05,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:05,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:05,664 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:05,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:05,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-05-03 14:34:05,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168288006] [2021-05-03 14:34:05,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:34:05,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:34:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:34:05,718 INFO L87 Difference]: Start difference. First operand 90 states and 184 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:06,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:06,348 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-05-03 14:34:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:34:06,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:06,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:06,349 INFO L225 Difference]: With dead ends: 130 [2021-05-03 14:34:06,349 INFO L226 Difference]: Without dead ends: 117 [2021-05-03 14:34:06,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:34:06,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-03 14:34:06,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-05-03 14:34:06,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 94 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:06,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 194 transitions. [2021-05-03 14:34:06,351 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 194 transitions. Word has length 18 [2021-05-03 14:34:06,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:06,351 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 194 transitions. [2021-05-03 14:34:06,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:06,351 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 194 transitions. [2021-05-03 14:34:06,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:06,351 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:06,351 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:06,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1092 [2021-05-03 14:34:06,553 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:06,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:06,553 INFO L82 PathProgramCache]: Analyzing trace with hash -593422098, now seen corresponding path program 190 times [2021-05-03 14:34:06,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:06,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859343633] [2021-05-03 14:34:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:06,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:06,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859343633] [2021-05-03 14:34:06,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426728236] [2021-05-03 14:34:06,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:34:06,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:34:06,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:06,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:06,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:07,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:07,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:07,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:07,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:07,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:07,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:07,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:07,328 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-05-03 14:34:07,328 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-05-03 14:34:07,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:07,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:07,337 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:07,389 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:07,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:07,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:07,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:07,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:07,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:07,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:07,462 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:07,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:07,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:07,506 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:07,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:07,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:34:07,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332184931] [2021-05-03 14:34:07,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:34:07,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:34:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:34:07,623 INFO L87 Difference]: Start difference. First operand 95 states and 194 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:08,530 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:34:08,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:08,567 INFO L93 Difference]: Finished difference Result 151 states and 287 transitions. [2021-05-03 14:34:08,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:34:08,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:08,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:08,569 INFO L225 Difference]: With dead ends: 151 [2021-05-03 14:34:08,569 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:34:08,569 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1141.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:34:08,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:34:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 94. [2021-05-03 14:34:08,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.064516129032258) internal successors, (192), 93 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 192 transitions. [2021-05-03 14:34:08,570 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 192 transitions. Word has length 18 [2021-05-03 14:34:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:08,570 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 192 transitions. [2021-05-03 14:34:08,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 192 transitions. [2021-05-03 14:34:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:08,570 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:08,571 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:08,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1096,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:08,771 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1555374438, now seen corresponding path program 191 times [2021-05-03 14:34:08,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:08,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396276834] [2021-05-03 14:34:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:09,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396276834] [2021-05-03 14:34:09,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901518314] [2021-05-03 14:34:09,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:09,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:34:09,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:09,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:09,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:09,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:09,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:09,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:09,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:09,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:09,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:09,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:09,257 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:09,348 INFO L628 ElimStorePlain]: treesize reduction 77, result has 47.6 percent of original size [2021-05-03 14:34:09,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:09,356 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:09,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:09,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:09,365 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:09,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:09,403 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:09,403 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:09,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:09,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:34:09,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740979647] [2021-05-03 14:34:09,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:34:09,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:09,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:34:09,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:34:09,519 INFO L87 Difference]: Start difference. First operand 94 states and 192 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:10,600 INFO L93 Difference]: Finished difference Result 161 states and 312 transitions. [2021-05-03 14:34:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:34:10,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:10,601 INFO L225 Difference]: With dead ends: 161 [2021-05-03 14:34:10,601 INFO L226 Difference]: Without dead ends: 142 [2021-05-03 14:34:10,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1096.8ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:34:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-03 14:34:10,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 96. [2021-05-03 14:34:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 95 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 197 transitions. [2021-05-03 14:34:10,603 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 197 transitions. Word has length 18 [2021-05-03 14:34:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:10,603 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 197 transitions. [2021-05-03 14:34:10,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 197 transitions. [2021-05-03 14:34:10,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:10,603 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:10,603 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:10,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1101,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:10,825 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash -975694478, now seen corresponding path program 192 times [2021-05-03 14:34:10,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:10,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91735242] [2021-05-03 14:34:10,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:11,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91735242] [2021-05-03 14:34:11,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204096663] [2021-05-03 14:34:11,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:11,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:34:11,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:11,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:11,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:11,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:11,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:11,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:11,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:11,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:11,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:11,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:11,576 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-05-03 14:34:11,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:11,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:34:11,582 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:11,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:11,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:11,598 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:11,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:11,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:11,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063270543] [2021-05-03 14:34:11,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:11,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:11,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:11,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:11,680 INFO L87 Difference]: Start difference. First operand 96 states and 197 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:12,110 INFO L93 Difference]: Finished difference Result 118 states and 231 transitions. [2021-05-03 14:34:12,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:34:12,111 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:12,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:12,112 INFO L225 Difference]: With dead ends: 118 [2021-05-03 14:34:12,112 INFO L226 Difference]: Without dead ends: 99 [2021-05-03 14:34:12,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 684.3ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:12,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-03 14:34:12,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-05-03 14:34:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:12,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 199 transitions. [2021-05-03 14:34:12,114 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 199 transitions. Word has length 18 [2021-05-03 14:34:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:12,114 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 199 transitions. [2021-05-03 14:34:12,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:12,114 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 199 transitions. [2021-05-03 14:34:12,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:12,114 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:12,114 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:12,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-05-03 14:34:12,315 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:12,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:12,315 INFO L82 PathProgramCache]: Analyzing trace with hash -23341270, now seen corresponding path program 193 times [2021-05-03 14:34:12,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:12,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698527032] [2021-05-03 14:34:12,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:12,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698527032] [2021-05-03 14:34:12,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387755489] [2021-05-03 14:34:12,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:12,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:12,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:12,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:12,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:12,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:12,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:12,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:12,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:12,901 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:12,936 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-05-03 14:34:12,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:12,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:12,942 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:12,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:12,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:12,955 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:34:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:13,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:13,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:13,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348816678] [2021-05-03 14:34:13,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:13,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:13,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:13,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:13,016 INFO L87 Difference]: Start difference. First operand 97 states and 199 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:13,392 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2021-05-03 14:34:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:34:13,392 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:13,393 INFO L225 Difference]: With dead ends: 116 [2021-05-03 14:34:13,393 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 14:34:13,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 14:34:13,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2021-05-03 14:34:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0721649484536084) internal successors, (201), 97 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:13,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 201 transitions. [2021-05-03 14:34:13,394 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 201 transitions. Word has length 18 [2021-05-03 14:34:13,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:13,394 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 201 transitions. [2021-05-03 14:34:13,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:13,395 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 201 transitions. [2021-05-03 14:34:13,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:13,395 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:13,395 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:13,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1107,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:13,595 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:13,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:13,596 INFO L82 PathProgramCache]: Analyzing trace with hash 838663794, now seen corresponding path program 194 times [2021-05-03 14:34:13,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:13,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490937673] [2021-05-03 14:34:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:14,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490937673] [2021-05-03 14:34:14,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546852008] [2021-05-03 14:34:14,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:14,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:34:14,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:14,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:14,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:14,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:14,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:14,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:14,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:14,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:14,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:14,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:14,407 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-05-03 14:34:14,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:14,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:34:14,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:14,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:14,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:14,424 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:14,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:14,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:14,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435536479] [2021-05-03 14:34:14,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:14,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:14,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:14,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:14,488 INFO L87 Difference]: Start difference. First operand 98 states and 201 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:14,952 INFO L93 Difference]: Finished difference Result 115 states and 227 transitions. [2021-05-03 14:34:14,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:34:14,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:14,953 INFO L225 Difference]: With dead ends: 115 [2021-05-03 14:34:14,953 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 14:34:14,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 780.5ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 14:34:14,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2021-05-03 14:34:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-05-03 14:34:14,955 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-05-03 14:34:14,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:14,955 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-05-03 14:34:14,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:14,955 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-05-03 14:34:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:14,955 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:14,955 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:15,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-05-03 14:34:15,156 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:15,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:15,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1974849066, now seen corresponding path program 195 times [2021-05-03 14:34:15,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:15,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603217975] [2021-05-03 14:34:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:15,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603217975] [2021-05-03 14:34:15,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405930846] [2021-05-03 14:34:15,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:15,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:34:15,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:15,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:15,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:15,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:15,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:15,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:15,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:15,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:15,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:15,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:15,932 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 14:34:15,933 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:34:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:15,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:15,939 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:15,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:15,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:15,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:15,985 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:16,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:16,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:16,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:16,027 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:16,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:16,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:16,063 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:16,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:16,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:16,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:16,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724839565] [2021-05-03 14:34:16,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:16,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:16,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:16,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:16,192 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:16,874 INFO L93 Difference]: Finished difference Result 138 states and 265 transitions. [2021-05-03 14:34:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:34:16,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:16,876 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:34:16,876 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:34:16,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 857.9ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:34:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:34:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2021-05-03 14:34:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 199 transitions. [2021-05-03 14:34:16,877 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 199 transitions. Word has length 18 [2021-05-03 14:34:16,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:16,877 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 199 transitions. [2021-05-03 14:34:16,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:16,877 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 199 transitions. [2021-05-03 14:34:16,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:16,878 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:16,878 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:17,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1115 [2021-05-03 14:34:17,078 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1695884842, now seen corresponding path program 196 times [2021-05-03 14:34:17,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:17,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600246372] [2021-05-03 14:34:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:17,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600246372] [2021-05-03 14:34:17,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589306890] [2021-05-03 14:34:17,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:17,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:34:17,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:17,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:17,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:17,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:17,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:17,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:17,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:17,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:17,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:17,645 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-05-03 14:34:17,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:17,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:17,651 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:17,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:17,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:17,664 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:17,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:17,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:17,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:17,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063036477] [2021-05-03 14:34:17,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:17,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:17,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:17,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:17,725 INFO L87 Difference]: Start difference. First operand 97 states and 199 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:18,111 INFO L93 Difference]: Finished difference Result 117 states and 230 transitions. [2021-05-03 14:34:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:34:18,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:18,112 INFO L225 Difference]: With dead ends: 117 [2021-05-03 14:34:18,112 INFO L226 Difference]: Without dead ends: 101 [2021-05-03 14:34:18,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 525.2ms TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:18,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-03 14:34:18,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2021-05-03 14:34:18,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-05-03 14:34:18,114 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-05-03 14:34:18,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:18,114 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-05-03 14:34:18,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-05-03 14:34:18,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:18,114 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:18,114 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:18,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,197 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:18,315 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:18,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:18,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1737077390, now seen corresponding path program 197 times [2021-05-03 14:34:18,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:18,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485479755] [2021-05-03 14:34:18,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:18,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485479755] [2021-05-03 14:34:18,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692894418] [2021-05-03 14:34:18,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:18,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:34:18,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:18,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:18,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:18,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:18,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:18,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:18,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:18,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:18,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:18,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:18,927 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-05-03 14:34:18,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:18,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:18,934 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:18,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:18,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:18,947 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:19,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:19,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:19,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862450785] [2021-05-03 14:34:19,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:19,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:19,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:19,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:19,012 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:19,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:19,685 INFO L93 Difference]: Finished difference Result 119 states and 238 transitions. [2021-05-03 14:34:19,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:34:19,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:19,687 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:34:19,687 INFO L226 Difference]: Without dead ends: 106 [2021-05-03 14:34:19,687 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 706.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:34:19,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-03 14:34:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-05-03 14:34:19,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 205 transitions. [2021-05-03 14:34:19,689 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 205 transitions. Word has length 18 [2021-05-03 14:34:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:19,689 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 205 transitions. [2021-05-03 14:34:19,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:19,689 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 205 transitions. [2021-05-03 14:34:19,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:19,689 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:19,689 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:19,889 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-05-03 14:34:19,889 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:19,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:19,890 INFO L82 PathProgramCache]: Analyzing trace with hash -600892118, now seen corresponding path program 198 times [2021-05-03 14:34:19,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:19,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290480841] [2021-05-03 14:34:19,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:20,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290480841] [2021-05-03 14:34:20,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578620251] [2021-05-03 14:34:20,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:20,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:34:20,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:20,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:20,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:20,381 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:20,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:20,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:20,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:20,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:20,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:20,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:20,471 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:34:20,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:20,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:20,476 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:20,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:20,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:20,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:20,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:20,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:20,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:20,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:20,582 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:20,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:20,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:20,623 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:20,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:20,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:20,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416786180] [2021-05-03 14:34:20,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:20,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:20,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:20,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:20,762 INFO L87 Difference]: Start difference. First operand 100 states and 205 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:21,588 INFO L93 Difference]: Finished difference Result 140 states and 269 transitions. [2021-05-03 14:34:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:34:21,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:21,589 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:34:21,589 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:34:21,590 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 899.6ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:34:21,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:34:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-05-03 14:34:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0729166666666665) internal successors, (199), 96 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 199 transitions. [2021-05-03 14:34:21,591 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 199 transitions. Word has length 18 [2021-05-03 14:34:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:21,591 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 199 transitions. [2021-05-03 14:34:21,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 199 transitions. [2021-05-03 14:34:21,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:21,591 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:21,592 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:21,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1127,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:21,792 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:21,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:21,792 INFO L82 PathProgramCache]: Analyzing trace with hash -434692494, now seen corresponding path program 199 times [2021-05-03 14:34:21,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:21,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316293173] [2021-05-03 14:34:21,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316293173] [2021-05-03 14:34:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439173666] [2021-05-03 14:34:22,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:22,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:22,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:22,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:22,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:22,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:22,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:22,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:22,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:22,442 INFO L628 ElimStorePlain]: treesize reduction 40, result has 43.7 percent of original size [2021-05-03 14:34:22,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:22,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:34:22,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:22,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:22,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:22,461 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:22,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:22,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:22,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384356209] [2021-05-03 14:34:22,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:22,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:22,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:22,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:22,525 INFO L87 Difference]: Start difference. First operand 97 states and 199 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:23,117 INFO L93 Difference]: Finished difference Result 122 states and 244 transitions. [2021-05-03 14:34:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:34:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:23,118 INFO L225 Difference]: With dead ends: 122 [2021-05-03 14:34:23,118 INFO L226 Difference]: Without dead ends: 109 [2021-05-03 14:34:23,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 717.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:34:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-03 14:34:23,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2021-05-03 14:34:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 101 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:23,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 209 transitions. [2021-05-03 14:34:23,120 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 209 transitions. Word has length 18 [2021-05-03 14:34:23,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:23,120 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 209 transitions. [2021-05-03 14:34:23,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 209 transitions. [2021-05-03 14:34:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:23,120 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:23,120 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:23,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-05-03 14:34:23,321 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:23,321 INFO L82 PathProgramCache]: Analyzing trace with hash 701492778, now seen corresponding path program 200 times [2021-05-03 14:34:23,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:23,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491439793] [2021-05-03 14:34:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:23,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:23,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491439793] [2021-05-03 14:34:23,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831672473] [2021-05-03 14:34:23,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:23,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:34:23,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:23,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:23,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:23,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:23,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:23,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:23,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:23,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:23,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:23,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:24,125 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-05-03 14:34:24,125 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-05-03 14:34:24,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:24,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:24,135 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:24,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:24,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:24,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:24,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:24,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:24,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:24,231 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:24,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:24,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:24,268 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:24,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:24,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:24,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283989510] [2021-05-03 14:34:24,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:24,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:24,390 INFO L87 Difference]: Start difference. First operand 102 states and 209 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:25,047 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 14:34:25,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:25,078 INFO L93 Difference]: Finished difference Result 144 states and 277 transitions. [2021-05-03 14:34:25,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:34:25,079 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:25,079 INFO L225 Difference]: With dead ends: 144 [2021-05-03 14:34:25,079 INFO L226 Difference]: Without dead ends: 125 [2021-05-03 14:34:25,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 980.6ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:34:25,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-03 14:34:25,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 101. [2021-05-03 14:34:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 207 transitions. [2021-05-03 14:34:25,081 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 207 transitions. Word has length 18 [2021-05-03 14:34:25,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:25,081 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 207 transitions. [2021-05-03 14:34:25,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 207 transitions. [2021-05-03 14:34:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:25,081 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:25,081 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:25,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1136 [2021-05-03 14:34:25,282 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:25,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1444677982, now seen corresponding path program 201 times [2021-05-03 14:34:25,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:25,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762062796] [2021-05-03 14:34:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:25,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:25,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762062796] [2021-05-03 14:34:25,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778118534] [2021-05-03 14:34:25,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:25,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:34:25,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:25,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:25,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:25,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:25,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:25,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:25,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:25,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:25,751 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:25,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:25,759 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:25,851 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-05-03 14:34:25,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:25,859 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:25,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:25,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:25,867 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:25,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:25,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:25,906 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:26,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:26,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:26,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989759280] [2021-05-03 14:34:26,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:26,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:26,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:26,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:26,032 INFO L87 Difference]: Start difference. First operand 101 states and 207 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:26,866 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-03 14:34:27,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:27,003 INFO L93 Difference]: Finished difference Result 167 states and 320 transitions. [2021-05-03 14:34:27,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:34:27,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:27,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:27,004 INFO L225 Difference]: With dead ends: 167 [2021-05-03 14:34:27,004 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:34:27,005 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1018.7ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:34:27,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:34:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 104. [2021-05-03 14:34:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0970873786407767) internal successors, (216), 103 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 216 transitions. [2021-05-03 14:34:27,006 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 216 transitions. Word has length 18 [2021-05-03 14:34:27,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:27,006 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 216 transitions. [2021-05-03 14:34:27,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 216 transitions. [2021-05-03 14:34:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:27,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:27,007 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:27,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:27,207 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash 743505194, now seen corresponding path program 202 times [2021-05-03 14:34:27,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:27,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122882385] [2021-05-03 14:34:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122882385] [2021-05-03 14:34:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983799460] [2021-05-03 14:34:27,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:27,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:34:27,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:27,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:27,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:27,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:27,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:27,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:27,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:27,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:27,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:27,684 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:27,778 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-05-03 14:34:27,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:27,785 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:27,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:27,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:27,791 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:27,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:27,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:27,828 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:27,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:27,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:27,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974225160] [2021-05-03 14:34:27,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:27,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:27,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:27,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:27,954 INFO L87 Difference]: Start difference. First operand 104 states and 216 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:28,720 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-03 14:34:29,010 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-03 14:34:29,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:29,278 INFO L93 Difference]: Finished difference Result 198 states and 380 transitions. [2021-05-03 14:34:29,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:34:29,279 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:29,280 INFO L225 Difference]: With dead ends: 198 [2021-05-03 14:34:29,280 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:34:29,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1392.7ms TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:34:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:34:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 108. [2021-05-03 14:34:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-05-03 14:34:29,282 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 18 [2021-05-03 14:34:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:29,282 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-05-03 14:34:29,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-05-03 14:34:29,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:29,282 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:29,282 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:29,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-05-03 14:34:29,483 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:29,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:29,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1244440906, now seen corresponding path program 203 times [2021-05-03 14:34:29,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:29,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081031879] [2021-05-03 14:34:29,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:29,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081031879] [2021-05-03 14:34:29,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260929527] [2021-05-03 14:34:29,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:29,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:34:29,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:29,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:29,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:30,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:30,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:30,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:30,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:30,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:30,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:30,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:30,160 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-05-03 14:34:30,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:30,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:30,166 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:30,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:30,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:30,179 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:30,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:30,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:30,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995441654] [2021-05-03 14:34:30,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:30,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:30,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:30,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:30,249 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:30,537 INFO L93 Difference]: Finished difference Result 130 states and 262 transitions. [2021-05-03 14:34:30,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:34:30,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:30,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:30,538 INFO L225 Difference]: With dead ends: 130 [2021-05-03 14:34:30,538 INFO L226 Difference]: Without dead ends: 111 [2021-05-03 14:34:30,539 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:34:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-03 14:34:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2021-05-03 14:34:30,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1296296296296298) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 230 transitions. [2021-05-03 14:34:30,540 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 230 transitions. Word has length 18 [2021-05-03 14:34:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:30,540 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 230 transitions. [2021-05-03 14:34:30,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 230 transitions. [2021-05-03 14:34:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:30,540 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:30,540 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:30,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1147 [2021-05-03 14:34:30,741 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:30,741 INFO L82 PathProgramCache]: Analyzing trace with hash -292087698, now seen corresponding path program 204 times [2021-05-03 14:34:30,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:30,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284009859] [2021-05-03 14:34:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:31,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284009859] [2021-05-03 14:34:31,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96974963] [2021-05-03 14:34:31,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:31,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:34:31,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:31,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:34:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:31,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:31,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:31,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:31,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:31,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:31,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:31,430 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:31,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:31,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:31,442 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:13 [2021-05-03 14:34:31,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:31,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:31,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:31,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959782394] [2021-05-03 14:34:31,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:31,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:31,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:31,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:31,510 INFO L87 Difference]: Start difference. First operand 109 states and 230 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:31,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:31,843 INFO L93 Difference]: Finished difference Result 128 states and 262 transitions. [2021-05-03 14:34:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:34:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:31,844 INFO L225 Difference]: With dead ends: 128 [2021-05-03 14:34:31,844 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:34:31,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 685.5ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:34:31,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:34:31,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2021-05-03 14:34:31,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-05-03 14:34:31,845 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-05-03 14:34:31,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:31,845 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-05-03 14:34:31,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:31,845 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-05-03 14:34:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:31,845 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:31,845 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:32,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1151,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:32,046 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:32,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:32,046 INFO L82 PathProgramCache]: Analyzing trace with hash 569917366, now seen corresponding path program 205 times [2021-05-03 14:34:32,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:32,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829707233] [2021-05-03 14:34:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:32,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829707233] [2021-05-03 14:34:32,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975332461] [2021-05-03 14:34:32,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:32,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:32,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:32,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:32,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:32,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:32,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:32,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:32,802 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-05-03 14:34:32,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:32,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:32,809 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:32,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:32,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:32,823 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:32,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:32,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:32,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520406508] [2021-05-03 14:34:32,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:32,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:32,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:32,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:32,894 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:33,537 INFO L93 Difference]: Finished difference Result 138 states and 281 transitions. [2021-05-03 14:34:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:34:33,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:33,538 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:34:33,538 INFO L226 Difference]: Without dead ends: 125 [2021-05-03 14:34:33,538 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 857.2ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:34:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-03 14:34:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 111. [2021-05-03 14:34:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1363636363636362) internal successors, (235), 110 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 235 transitions. [2021-05-03 14:34:33,540 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 235 transitions. Word has length 18 [2021-05-03 14:34:33,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:33,540 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 235 transitions. [2021-05-03 14:34:33,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:33,540 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 235 transitions. [2021-05-03 14:34:33,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:33,540 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:33,540 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:33,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-05-03 14:34:33,741 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:33,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:33,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1706102638, now seen corresponding path program 206 times [2021-05-03 14:34:33,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:33,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416891167] [2021-05-03 14:34:33,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:33,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:34,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416891167] [2021-05-03 14:34:34,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766386610] [2021-05-03 14:34:34,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:34,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:34:34,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:34,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:34,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:34,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:34,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:34,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:34,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:34,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:34,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:34,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:34,591 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-05-03 14:34:34,591 INFO L628 ElimStorePlain]: treesize reduction 88, result has 45.0 percent of original size [2021-05-03 14:34:34,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:34,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:34,599 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:34,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:34,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:34,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:34,645 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:34,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:34,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:34,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:34,689 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:34,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:34,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:34,728 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:34,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:34,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:34,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153145677] [2021-05-03 14:34:34,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:34,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:34,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:34,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:34,862 INFO L87 Difference]: Start difference. First operand 111 states and 235 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:35,548 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 14:34:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:35,596 INFO L93 Difference]: Finished difference Result 159 states and 312 transitions. [2021-05-03 14:34:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:34:35,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:35,598 INFO L225 Difference]: With dead ends: 159 [2021-05-03 14:34:35,598 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:34:35,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1051.5ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:34:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:34:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 108. [2021-05-03 14:34:35,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.130841121495327) internal successors, (228), 107 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 228 transitions. [2021-05-03 14:34:35,600 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 228 transitions. Word has length 18 [2021-05-03 14:34:35,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:35,600 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 228 transitions. [2021-05-03 14:34:35,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:35,600 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 228 transitions. [2021-05-03 14:34:35,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:35,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:35,600 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:35,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1158 [2021-05-03 14:34:35,801 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:35,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:35,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1177885978, now seen corresponding path program 207 times [2021-05-03 14:34:35,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:35,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687169499] [2021-05-03 14:34:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:36,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687169499] [2021-05-03 14:34:36,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266311321] [2021-05-03 14:34:36,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:36,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:34:36,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:36,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:34:36,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:36,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:36,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:36,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:36,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:36,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:36,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:34:36,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:36,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:36,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:36,416 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:36, output treesize:13 [2021-05-03 14:34:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:36,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:36,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:36,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804179169] [2021-05-03 14:34:36,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:36,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:36,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:36,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:36,483 INFO L87 Difference]: Start difference. First operand 108 states and 228 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:36,938 INFO L93 Difference]: Finished difference Result 127 states and 260 transitions. [2021-05-03 14:34:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:34:36,939 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:36,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:36,940 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:34:36,940 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:34:36,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 626.5ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:34:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:34:36,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 109. [2021-05-03 14:34:36,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.138888888888889) internal successors, (231), 108 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 231 transitions. [2021-05-03 14:34:36,941 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 231 transitions. Word has length 18 [2021-05-03 14:34:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:36,942 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 231 transitions. [2021-05-03 14:34:36,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:36,942 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 231 transitions. [2021-05-03 14:34:36,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:36,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:36,942 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:37,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1163,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:37,143 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:37,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:37,143 INFO L82 PathProgramCache]: Analyzing trace with hash -315880914, now seen corresponding path program 208 times [2021-05-03 14:34:37,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:37,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950321324] [2021-05-03 14:34:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:37,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:37,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950321324] [2021-05-03 14:34:37,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566931800] [2021-05-03 14:34:37,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:37,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:34:37,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:37,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:37,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:37,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:37,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:37,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:37,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:37,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:37,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:37,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:37,851 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-05-03 14:34:37,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:37,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:37,858 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:37,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:37,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:37,872 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:34:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:37,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:37,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:37,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829352529] [2021-05-03 14:34:37,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:37,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:37,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:37,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:37,942 INFO L87 Difference]: Start difference. First operand 109 states and 231 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:38,661 INFO L93 Difference]: Finished difference Result 137 states and 279 transitions. [2021-05-03 14:34:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:34:38,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:38,662 INFO L225 Difference]: With dead ends: 137 [2021-05-03 14:34:38,662 INFO L226 Difference]: Without dead ends: 124 [2021-05-03 14:34:38,662 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 879.2ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:34:38,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-03 14:34:38,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-05-03 14:34:38,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-05-03 14:34:38,664 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-05-03 14:34:38,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:38,664 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-05-03 14:34:38,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-05-03 14:34:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:38,665 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:38,665 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:38,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-05-03 14:34:38,889 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash 820304358, now seen corresponding path program 209 times [2021-05-03 14:34:38,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:38,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357439663] [2021-05-03 14:34:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:39,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357439663] [2021-05-03 14:34:39,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404413801] [2021-05-03 14:34:39,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:39,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:34:39,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:39,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:39,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:39,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:39,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:39,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:39,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:39,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:39,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:39,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:39,660 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 14:34:39,661 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:34:39,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:39,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:39,669 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:39,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:39,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:39,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:39,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:39,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:39,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:39,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:39,770 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:39,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:39,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:39,810 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:39,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:39,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:39,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994068256] [2021-05-03 14:34:39,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:39,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:39,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:39,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:39,941 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:40,773 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2021-05-03 14:34:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:41,428 INFO L93 Difference]: Finished difference Result 241 states and 443 transitions. [2021-05-03 14:34:41,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:34:41,429 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:41,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:41,429 INFO L225 Difference]: With dead ends: 241 [2021-05-03 14:34:41,429 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 14:34:41,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1600.5ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:34:41,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 14:34:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 113. [2021-05-03 14:34:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.169642857142857) internal successors, (243), 112 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 243 transitions. [2021-05-03 14:34:41,432 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 243 transitions. Word has length 18 [2021-05-03 14:34:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:41,432 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 243 transitions. [2021-05-03 14:34:41,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:41,432 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 243 transitions. [2021-05-03 14:34:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:41,433 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:41,433 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:41,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1170,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:41,653 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash 578515942, now seen corresponding path program 210 times [2021-05-03 14:34:41,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:41,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429895695] [2021-05-03 14:34:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:41,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:41,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429895695] [2021-05-03 14:34:41,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651758527] [2021-05-03 14:34:41,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:41,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:34:41,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:41,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:41,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:42,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:42,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:42,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:42,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:42,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:42,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:42,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:42,212 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-05-03 14:34:42,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:42,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:42,218 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:42,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:42,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:42,232 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:34:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:42,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:42,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:42,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052736843] [2021-05-03 14:34:42,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:42,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:42,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:42,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:42,290 INFO L87 Difference]: Start difference. First operand 113 states and 243 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:42,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:42,728 INFO L93 Difference]: Finished difference Result 140 states and 292 transitions. [2021-05-03 14:34:42,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:34:42,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:42,729 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:34:42,729 INFO L226 Difference]: Without dead ends: 124 [2021-05-03 14:34:42,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:34:42,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-03 14:34:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 115. [2021-05-03 14:34:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1666666666666665) internal successors, (247), 114 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 247 transitions. [2021-05-03 14:34:42,731 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 247 transitions. Word has length 18 [2021-05-03 14:34:42,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:42,731 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 247 transitions. [2021-05-03 14:34:42,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:42,731 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 247 transitions. [2021-05-03 14:34:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:42,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:42,731 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:42,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1175,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:42,932 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:42,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:42,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1440521006, now seen corresponding path program 211 times [2021-05-03 14:34:42,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:42,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131328343] [2021-05-03 14:34:42,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:43,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131328343] [2021-05-03 14:34:43,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549267662] [2021-05-03 14:34:43,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:43,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:43,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:43,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:43,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:43,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:43,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:43,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:43,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:34:43,617 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:43,656 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-05-03 14:34:43,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:43,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:43,663 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:43,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:43,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:34:43,677 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:34:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:43,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:43,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:43,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243102268] [2021-05-03 14:34:43,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:43,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:43,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:43,753 INFO L87 Difference]: Start difference. First operand 115 states and 247 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:44,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:44,331 INFO L93 Difference]: Finished difference Result 134 states and 280 transitions. [2021-05-03 14:34:44,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:34:44,332 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:44,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:44,332 INFO L225 Difference]: With dead ends: 134 [2021-05-03 14:34:44,332 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:34:44,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 836.0ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:34:44,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:34:44,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2021-05-03 14:34:44,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1652173913043478) internal successors, (249), 115 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:44,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 249 transitions. [2021-05-03 14:34:44,334 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 249 transitions. Word has length 18 [2021-05-03 14:34:44,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:44,334 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 249 transitions. [2021-05-03 14:34:44,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:44,334 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 249 transitions. [2021-05-03 14:34:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:44,335 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:44,335 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:44,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1179 [2021-05-03 14:34:44,549 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:44,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:44,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1718261018, now seen corresponding path program 212 times [2021-05-03 14:34:44,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:44,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249549779] [2021-05-03 14:34:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:44,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249549779] [2021-05-03 14:34:44,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114826518] [2021-05-03 14:34:44,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:44,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:34:44,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:44,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:34:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:45,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:45,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:45,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:45,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:45,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:45,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:45,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:45,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:45,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:45,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:45,223 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:45,257 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:45,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:45,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:45,266 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:45,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:45,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:45,299 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-05-03 14:34:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:45,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:45,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:45,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713583742] [2021-05-03 14:34:45,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:45,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:45,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:45,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:45,416 INFO L87 Difference]: Start difference. First operand 116 states and 249 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:46,005 INFO L93 Difference]: Finished difference Result 156 states and 316 transitions. [2021-05-03 14:34:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:34:46,006 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:46,006 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:34:46,006 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:34:46,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 786.5ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:34:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:34:46,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 117. [2021-05-03 14:34:46,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1724137931034484) internal successors, (252), 116 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:46,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 252 transitions. [2021-05-03 14:34:46,008 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 252 transitions. Word has length 18 [2021-05-03 14:34:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:46,008 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 252 transitions. [2021-05-03 14:34:46,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 252 transitions. [2021-05-03 14:34:46,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:46,009 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:46,009 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:46,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1182,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:46,213 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:46,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:46,213 INFO L82 PathProgramCache]: Analyzing trace with hash -666263114, now seen corresponding path program 213 times [2021-05-03 14:34:46,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:46,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793689911] [2021-05-03 14:34:46,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:46,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793689911] [2021-05-03 14:34:46,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287872759] [2021-05-03 14:34:46,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:46,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:34:46,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:46,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:34:46,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:46,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:46,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:46,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:46,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:46,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:46,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:46,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:46,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:46,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:46,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:46,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:46,789 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:46,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:46,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:46,796 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:46,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:46,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:46,828 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-05-03 14:34:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:46,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:46,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806172388] [2021-05-03 14:34:46,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:46,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:46,917 INFO L87 Difference]: Start difference. First operand 117 states and 252 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:47,622 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-05-03 14:34:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:34:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:47,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:47,623 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:34:47,623 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:34:47,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 740.8ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:34:47,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:34:47,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2021-05-03 14:34:47,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.169491525423729) internal successors, (256), 118 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:47,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 256 transitions. [2021-05-03 14:34:47,625 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 256 transitions. Word has length 18 [2021-05-03 14:34:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:47,625 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 256 transitions. [2021-05-03 14:34:47,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 256 transitions. [2021-05-03 14:34:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:47,626 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:47,626 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:47,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1187 [2021-05-03 14:34:47,826 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash 469922158, now seen corresponding path program 214 times [2021-05-03 14:34:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:47,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387609875] [2021-05-03 14:34:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:48,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387609875] [2021-05-03 14:34:48,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414665657] [2021-05-03 14:34:48,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:48,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:34:48,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:48,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:48,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:48,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:48,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:48,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:48,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:48,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:48,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:48,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:48,562 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-05-03 14:34:48,563 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-05-03 14:34:48,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:48,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:48,572 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:48,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:48,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:48,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:48,623 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:48,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:48,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:48,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:48,671 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:48,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:48,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:48,709 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:48,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:48,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:48,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919184139] [2021-05-03 14:34:48,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:48,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:48,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:48,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:48,843 INFO L87 Difference]: Start difference. First operand 119 states and 256 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:49,649 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:34:49,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:49,686 INFO L93 Difference]: Finished difference Result 159 states and 320 transitions. [2021-05-03 14:34:49,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:34:49,687 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:49,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:49,688 INFO L225 Difference]: With dead ends: 159 [2021-05-03 14:34:49,688 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:34:49,688 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1141.0ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:34:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:34:49,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 118. [2021-05-03 14:34:49,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1709401709401708) internal successors, (254), 117 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 254 transitions. [2021-05-03 14:34:49,690 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 254 transitions. Word has length 18 [2021-05-03 14:34:49,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:49,690 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 254 transitions. [2021-05-03 14:34:49,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:49,690 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 254 transitions. [2021-05-03 14:34:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:49,690 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:49,690 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:49,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:49,891 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:49,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:49,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1676248602, now seen corresponding path program 215 times [2021-05-03 14:34:49,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:49,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910864375] [2021-05-03 14:34:49,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:49,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:50,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910864375] [2021-05-03 14:34:50,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644969786] [2021-05-03 14:34:50,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:50,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:34:50,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:50,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:50,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:50,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:50,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:50,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:50,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:50,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:50,433 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:50,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:50,441 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:50,543 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-05-03 14:34:50,544 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-05-03 14:34:50,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:50,553 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:50,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:50,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:50,561 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:50,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:50,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:50,603 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:50,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:50,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:50,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679395990] [2021-05-03 14:34:50,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:50,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:50,730 INFO L87 Difference]: Start difference. First operand 118 states and 254 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:51,457 INFO L93 Difference]: Finished difference Result 168 states and 343 transitions. [2021-05-03 14:34:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:34:51,458 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:51,458 INFO L225 Difference]: With dead ends: 168 [2021-05-03 14:34:51,458 INFO L226 Difference]: Without dead ends: 149 [2021-05-03 14:34:51,458 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 916.1ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:34:51,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-03 14:34:51,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-05-03 14:34:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1724137931034484) internal successors, (252), 116 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:51,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 252 transitions. [2021-05-03 14:34:51,460 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 252 transitions. Word has length 18 [2021-05-03 14:34:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:51,460 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 252 transitions. [2021-05-03 14:34:51,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 252 transitions. [2021-05-03 14:34:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:51,460 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:51,460 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:51,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-05-03 14:34:51,661 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:51,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:51,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1052962998, now seen corresponding path program 216 times [2021-05-03 14:34:51,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:51,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935839064] [2021-05-03 14:34:51,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:51,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:51,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935839064] [2021-05-03 14:34:51,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565667264] [2021-05-03 14:34:51,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:52,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:34:52,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:52,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:34:52,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:52,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:52,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:52,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:52,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:52,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:52,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:52,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:52,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:52,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:52,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:52,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:52,404 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:52,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:52,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:52,414 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:52,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:52,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:52,459 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:67, output treesize:29 [2021-05-03 14:34:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:52,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:52,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:52,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319571351] [2021-05-03 14:34:52,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:52,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:52,575 INFO L87 Difference]: Start difference. First operand 117 states and 252 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:53,153 INFO L93 Difference]: Finished difference Result 139 states and 291 transitions. [2021-05-03 14:34:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:34:53,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:53,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:53,155 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:34:53,155 INFO L226 Difference]: Without dead ends: 126 [2021-05-03 14:34:53,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 766.2ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:34:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-03 14:34:53,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2021-05-03 14:34:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1666666666666665) internal successors, (260), 120 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 260 transitions. [2021-05-03 14:34:53,157 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 260 transitions. Word has length 18 [2021-05-03 14:34:53,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:53,157 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 260 transitions. [2021-05-03 14:34:53,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:53,157 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 260 transitions. [2021-05-03 14:34:53,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:53,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:53,157 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:53,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1201 [2021-05-03 14:34:53,358 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:53,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:53,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2105819026, now seen corresponding path program 217 times [2021-05-03 14:34:53,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:53,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675412387] [2021-05-03 14:34:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:53,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675412387] [2021-05-03 14:34:53,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061920481] [2021-05-03 14:34:53,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:53,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:53,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:53,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:53,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:53,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:53,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:53,941 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:54,059 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 14:34:54,059 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:34:54,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:54,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:54,069 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:54,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:54,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:54,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:54,120 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:54,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:54,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:54,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:54,168 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:54,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:54,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:54,207 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:54,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:54,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:34:54,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426900949] [2021-05-03 14:34:54,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:34:54,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:54,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:34:54,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:34:54,334 INFO L87 Difference]: Start difference. First operand 121 states and 260 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:54,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:54,878 INFO L93 Difference]: Finished difference Result 160 states and 322 transitions. [2021-05-03 14:34:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:34:54,879 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:54,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:54,879 INFO L225 Difference]: With dead ends: 160 [2021-05-03 14:34:54,879 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:34:54,879 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 706.0ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:34:54,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:34:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2021-05-03 14:34:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.168067226890756) internal successors, (258), 119 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 258 transitions. [2021-05-03 14:34:54,881 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 258 transitions. Word has length 18 [2021-05-03 14:34:54,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:54,881 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 258 transitions. [2021-05-03 14:34:54,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 258 transitions. [2021-05-03 14:34:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:54,881 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:54,881 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:55,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1207,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:55,082 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:55,082 INFO L82 PathProgramCache]: Analyzing trace with hash 42977510, now seen corresponding path program 218 times [2021-05-03 14:34:55,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:55,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306693338] [2021-05-03 14:34:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:55,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306693338] [2021-05-03 14:34:55,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463928226] [2021-05-03 14:34:55,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:55,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:34:55,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:55,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:34:55,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:55,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:55,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:55,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:55,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:55,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:55,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:55,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:55,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:55,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:55,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:55,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:55,686 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:55,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:55,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:34:55,694 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:55,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:55,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:55,731 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:34:55,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:55,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:55,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:55,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366322182] [2021-05-03 14:34:55,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:55,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:55,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:55,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:55,865 INFO L87 Difference]: Start difference. First operand 120 states and 258 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:57,059 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 14:34:57,238 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:34:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:34:57,294 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2021-05-03 14:34:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:34:57,295 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:34:57,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:34:57,296 INFO L225 Difference]: With dead ends: 188 [2021-05-03 14:34:57,296 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:34:57,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1451.1ms TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:34:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:34:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 122. [2021-05-03 14:34:57,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1818181818181817) internal successors, (264), 121 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:57,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 264 transitions. [2021-05-03 14:34:57,298 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 264 transitions. Word has length 18 [2021-05-03 14:34:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:34:57,302 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 264 transitions. [2021-05-03 14:34:57,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:57,303 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 264 transitions. [2021-05-03 14:34:57,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:34:57,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:34:57,303 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:34:57,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-05-03 14:34:57,504 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:34:57,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:34:57,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2063806610, now seen corresponding path program 219 times [2021-05-03 14:34:57,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:34:57,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629904914] [2021-05-03 14:34:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:34:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:34:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:57,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629904914] [2021-05-03 14:34:57,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517675598] [2021-05-03 14:34:57,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:34:57,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:34:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:34:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:34:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:34:58,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:58,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:58,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:58,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:58,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:58,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:58,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:34:58,138 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:34:58,238 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-05-03 14:34:58,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:58,248 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:58,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:34:58,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:34:58,256 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:34:58,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:34:58,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:34:58,300 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:34:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:34:58,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:34:58,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:34:58,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060924391] [2021-05-03 14:34:58,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:34:58,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:34:58,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:34:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:34:58,441 INFO L87 Difference]: Start difference. First operand 122 states and 264 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:34:59,416 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 14:34:59,867 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-05-03 14:35:00,100 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 14:35:00,286 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:35:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:00,321 INFO L93 Difference]: Finished difference Result 213 states and 422 transitions. [2021-05-03 14:35:00,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:35:00,323 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:00,323 INFO L225 Difference]: With dead ends: 213 [2021-05-03 14:35:00,323 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:35:00,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1884.2ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:35:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:35:00,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 122. [2021-05-03 14:35:00,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1818181818181817) internal successors, (264), 121 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:00,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 264 transitions. [2021-05-03 14:35:00,325 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 264 transitions. Word has length 18 [2021-05-03 14:35:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:00,325 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 264 transitions. [2021-05-03 14:35:00,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 264 transitions. [2021-05-03 14:35:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:00,326 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:00,326 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:00,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1215 [2021-05-03 14:35:00,526 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:00,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:00,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1345362406, now seen corresponding path program 220 times [2021-05-03 14:35:00,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:00,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891583284] [2021-05-03 14:35:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:00,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:00,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:00,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891583284] [2021-05-03 14:35:00,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985829764] [2021-05-03 14:35:00,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:00,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:35:00,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:00,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:00,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:01,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:01,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:01,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:01,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:01,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:01,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:01,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:01,106 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:01,207 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:35:01,208 INFO L628 ElimStorePlain]: treesize reduction 77, result has 45.4 percent of original size [2021-05-03 14:35:01,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:01,217 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:01,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:01,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:01,225 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:01,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:01,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:01,272 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:01,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:01,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:35:01,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090249122] [2021-05-03 14:35:01,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:35:01,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:01,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:35:01,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:35:01,469 INFO L87 Difference]: Start difference. First operand 122 states and 264 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:02,124 INFO L93 Difference]: Finished difference Result 153 states and 324 transitions. [2021-05-03 14:35:02,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:35:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:02,126 INFO L225 Difference]: With dead ends: 153 [2021-05-03 14:35:02,126 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:35:02,126 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 828.1ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:35:02,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:35:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2021-05-03 14:35:02,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.188976377952756) internal successors, (278), 127 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 278 transitions. [2021-05-03 14:35:02,127 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 278 transitions. Word has length 18 [2021-05-03 14:35:02,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:02,128 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 278 transitions. [2021-05-03 14:35:02,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:02,128 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 278 transitions. [2021-05-03 14:35:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:02,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:02,128 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:02,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1218,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:02,333 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:02,334 INFO L82 PathProgramCache]: Analyzing trace with hash -726850258, now seen corresponding path program 221 times [2021-05-03 14:35:02,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:02,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780209199] [2021-05-03 14:35:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:02,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780209199] [2021-05-03 14:35:02,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813666049] [2021-05-03 14:35:02,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:02,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:35:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:02,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:02,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:03,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:03,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:03,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:03,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:03,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:03,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:03,059 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:03,105 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-05-03 14:35:03,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:03,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:35:03,109 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:03,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:03,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:03,129 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:03,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:03,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:03,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79554286] [2021-05-03 14:35:03,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:03,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:03,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:03,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:03,214 INFO L87 Difference]: Start difference. First operand 128 states and 278 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:03,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:03,542 INFO L93 Difference]: Finished difference Result 151 states and 314 transitions. [2021-05-03 14:35:03,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:35:03,543 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:03,543 INFO L225 Difference]: With dead ends: 151 [2021-05-03 14:35:03,544 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:35:03,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 710.6ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:35:03,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:35:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 129. [2021-05-03 14:35:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1875) internal successors, (280), 128 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:03,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 280 transitions. [2021-05-03 14:35:03,546 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 280 transitions. Word has length 18 [2021-05-03 14:35:03,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:03,547 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 280 transitions. [2021-05-03 14:35:03,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:03,547 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 280 transitions. [2021-05-03 14:35:03,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:03,547 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:03,547 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:03,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-05-03 14:35:03,761 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:03,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:03,761 INFO L82 PathProgramCache]: Analyzing trace with hash 225502950, now seen corresponding path program 222 times [2021-05-03 14:35:03,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:03,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803039378] [2021-05-03 14:35:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:04,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803039378] [2021-05-03 14:35:04,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219363615] [2021-05-03 14:35:04,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:04,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:35:04,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:04,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:35:04,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:04,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:04,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:04,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:04,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:04,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:04,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:04,422 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:04,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:04,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:04,436 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:35:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:04,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:04,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:04,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654941375] [2021-05-03 14:35:04,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:04,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:04,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:04,511 INFO L87 Difference]: Start difference. First operand 129 states and 280 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:04,993 INFO L93 Difference]: Finished difference Result 149 states and 314 transitions. [2021-05-03 14:35:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:35:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:04,995 INFO L225 Difference]: With dead ends: 149 [2021-05-03 14:35:04,995 INFO L226 Difference]: Without dead ends: 142 [2021-05-03 14:35:04,996 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 733.9ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:35:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-03 14:35:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2021-05-03 14:35:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-05-03 14:35:04,997 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 18 [2021-05-03 14:35:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:04,998 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-05-03 14:35:04,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-05-03 14:35:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:04,998 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:04,998 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:05,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1222,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:05,199 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:05,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:05,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1087508014, now seen corresponding path program 223 times [2021-05-03 14:35:05,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:05,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367942874] [2021-05-03 14:35:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:05,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367942874] [2021-05-03 14:35:05,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763531224] [2021-05-03 14:35:05,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:05,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:05,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:05,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:05,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:05,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:05,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:05,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:05,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:05,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:05,949 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-05-03 14:35:05,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:05,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:05,956 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:05,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:05,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:05,971 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:06,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:06,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:06,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063371547] [2021-05-03 14:35:06,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:06,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:06,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:06,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:06,055 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:06,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:06,734 INFO L93 Difference]: Finished difference Result 160 states and 335 transitions. [2021-05-03 14:35:06,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:35:06,735 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:06,735 INFO L225 Difference]: With dead ends: 160 [2021-05-03 14:35:06,735 INFO L226 Difference]: Without dead ends: 147 [2021-05-03 14:35:06,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 891.6ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:35:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-03 14:35:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 131. [2021-05-03 14:35:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-05-03 14:35:06,738 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 18 [2021-05-03 14:35:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:06,738 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-05-03 14:35:06,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-05-03 14:35:06,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:06,738 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:06,738 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:06,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1223 [2021-05-03 14:35:06,939 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:06,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:06,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2071274010, now seen corresponding path program 224 times [2021-05-03 14:35:06,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:06,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432245243] [2021-05-03 14:35:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:07,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432245243] [2021-05-03 14:35:07,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668058031] [2021-05-03 14:35:07,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:07,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:35:07,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:07,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:07,720 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:07,723 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:07,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:07,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:07,741 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:07,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:07,749 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:07,852 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 14:35:07,853 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-05-03 14:35:07,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:07,862 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:07,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:07,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:07,870 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:07,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:07,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:07,914 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:08,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:08,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913867093] [2021-05-03 14:35:08,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:08,063 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:08,816 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-05-03 14:35:08,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:08,863 INFO L93 Difference]: Finished difference Result 180 states and 364 transitions. [2021-05-03 14:35:08,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:35:08,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:08,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:08,865 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:35:08,865 INFO L226 Difference]: Without dead ends: 161 [2021-05-03 14:35:08,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1187.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:35:08,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-03 14:35:08,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 128. [2021-05-03 14:35:08,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.188976377952756) internal successors, (278), 127 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:08,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 278 transitions. [2021-05-03 14:35:08,867 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 278 transitions. Word has length 18 [2021-05-03 14:35:08,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:08,867 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 278 transitions. [2021-05-03 14:35:08,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:08,867 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 278 transitions. [2021-05-03 14:35:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:08,867 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:08,867 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:09,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1224,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:09,068 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:09,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:09,068 INFO L82 PathProgramCache]: Analyzing trace with hash -660295330, now seen corresponding path program 225 times [2021-05-03 14:35:09,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:09,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794461750] [2021-05-03 14:35:09,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:09,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794461750] [2021-05-03 14:35:09,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879641306] [2021-05-03 14:35:09,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:09,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:35:09,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:09,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:35:09,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:09,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:09,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:09,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:09,531 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:09,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:09,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:09,536 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:09,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:09,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:09,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:35:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:09,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:09,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:09,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404005017] [2021-05-03 14:35:09,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:09,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:09,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:09,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:09,606 INFO L87 Difference]: Start difference. First operand 128 states and 278 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:09,901 INFO L93 Difference]: Finished difference Result 149 states and 314 transitions. [2021-05-03 14:35:09,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:35:09,901 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:09,902 INFO L225 Difference]: With dead ends: 149 [2021-05-03 14:35:09,902 INFO L226 Difference]: Without dead ends: 142 [2021-05-03 14:35:09,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 501.4ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:35:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-03 14:35:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 130. [2021-05-03 14:35:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:09,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-05-03 14:35:09,903 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 18 [2021-05-03 14:35:09,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:09,903 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-05-03 14:35:09,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:09,904 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-05-03 14:35:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:09,904 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:09,904 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:10,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1227 [2021-05-03 14:35:10,104 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash 201709734, now seen corresponding path program 226 times [2021-05-03 14:35:10,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:10,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657838806] [2021-05-03 14:35:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:10,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657838806] [2021-05-03 14:35:10,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91776222] [2021-05-03 14:35:10,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:10,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:35:10,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:10,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:10,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:10,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:10,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:10,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:10,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:10,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:10,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:10,650 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-05-03 14:35:10,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:10,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:10,655 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:10,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:10,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:10,666 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:10,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:10,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:10,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553311212] [2021-05-03 14:35:10,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:10,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:10,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:10,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:10,725 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:11,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:11,317 INFO L93 Difference]: Finished difference Result 159 states and 333 transitions. [2021-05-03 14:35:11,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:35:11,318 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:11,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:11,318 INFO L225 Difference]: With dead ends: 159 [2021-05-03 14:35:11,318 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 14:35:11,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 718.7ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:35:11,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 14:35:11,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 131. [2021-05-03 14:35:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 130 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 285 transitions. [2021-05-03 14:35:11,320 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 285 transitions. Word has length 18 [2021-05-03 14:35:11,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:11,321 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 285 transitions. [2021-05-03 14:35:11,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 285 transitions. [2021-05-03 14:35:11,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:11,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:11,337 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:11,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1228,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:11,549 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:11,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1337895006, now seen corresponding path program 227 times [2021-05-03 14:35:11,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:11,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451798831] [2021-05-03 14:35:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:11,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451798831] [2021-05-03 14:35:11,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636090819] [2021-05-03 14:35:11,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:11,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:35:11,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:11,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:12,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:12,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:12,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:12,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:12,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:12,078 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:12,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:12,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:12,167 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-05-03 14:35:12,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:12,174 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:12,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:12,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:12,179 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:12,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:12,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:12,213 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:12,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:12,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:35:12,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622937388] [2021-05-03 14:35:12,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:35:12,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:12,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:35:12,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:35:12,319 INFO L87 Difference]: Start difference. First operand 131 states and 285 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:13,516 INFO L93 Difference]: Finished difference Result 262 states and 495 transitions. [2021-05-03 14:35:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:35:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:13,518 INFO L225 Difference]: With dead ends: 262 [2021-05-03 14:35:13,518 INFO L226 Difference]: Without dead ends: 229 [2021-05-03 14:35:13,518 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1326.0ms TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:35:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-03 14:35:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 129. [2021-05-03 14:35:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1875) internal successors, (280), 128 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 280 transitions. [2021-05-03 14:35:13,520 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 280 transitions. Word has length 18 [2021-05-03 14:35:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:13,520 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 280 transitions. [2021-05-03 14:35:13,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 280 transitions. [2021-05-03 14:35:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:13,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:13,521 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:13,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1229,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:13,739 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:13,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:13,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1905074386, now seen corresponding path program 228 times [2021-05-03 14:35:13,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:13,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167465432] [2021-05-03 14:35:13,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:13,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:13,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167465432] [2021-05-03 14:35:13,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056707339] [2021-05-03 14:35:13,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:14,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:35:14,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:14,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:14,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:14,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:14,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:14,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:14,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:14,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:14,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:14,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:14,225 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-05-03 14:35:14,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:14,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:35:14,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:14,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:14,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:14,239 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:14,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:14,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:35:14,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145496379] [2021-05-03 14:35:14,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:35:14,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:35:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:35:14,288 INFO L87 Difference]: Start difference. First operand 129 states and 280 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:14,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:14,709 INFO L93 Difference]: Finished difference Result 150 states and 317 transitions. [2021-05-03 14:35:14,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:35:14,710 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:14,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:14,710 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:35:14,710 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:35:14,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:35:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:35:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2021-05-03 14:35:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1846153846153844) internal successors, (284), 130 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:14,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 284 transitions. [2021-05-03 14:35:14,712 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 284 transitions. Word has length 18 [2021-05-03 14:35:14,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:14,712 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 284 transitions. [2021-05-03 14:35:14,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:14,712 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 284 transitions. [2021-05-03 14:35:14,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:14,712 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:14,712 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:14,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1232 [2021-05-03 14:35:14,913 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:14,913 INFO L82 PathProgramCache]: Analyzing trace with hash -768889114, now seen corresponding path program 229 times [2021-05-03 14:35:14,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:14,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535255122] [2021-05-03 14:35:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:15,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:15,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535255122] [2021-05-03 14:35:15,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873577456] [2021-05-03 14:35:15,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:15,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:15,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:15,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:15,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:15,353 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:15,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:15,358 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:15,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:15,363 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:15,441 INFO L628 ElimStorePlain]: treesize reduction 80, result has 44.4 percent of original size [2021-05-03 14:35:15,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:15,447 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:15,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:15,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:15,451 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:15,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:15,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:15,483 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:15,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:15,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:15,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051522318] [2021-05-03 14:35:15,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:15,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:15,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:15,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:15,591 INFO L87 Difference]: Start difference. First operand 131 states and 284 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:16,230 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:35:16,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:16,271 INFO L93 Difference]: Finished difference Result 169 states and 344 transitions. [2021-05-03 14:35:16,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:35:16,271 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:16,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:16,272 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:35:16,272 INFO L226 Difference]: Without dead ends: 150 [2021-05-03 14:35:16,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 772.0ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:35:16,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-03 14:35:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 130. [2021-05-03 14:35:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.186046511627907) internal successors, (282), 129 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:16,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 282 transitions. [2021-05-03 14:35:16,273 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 282 transitions. Word has length 18 [2021-05-03 14:35:16,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:16,274 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 282 transitions. [2021-05-03 14:35:16,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:16,274 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 282 transitions. [2021-05-03 14:35:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:16,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:16,274 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:16,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-05-03 14:35:16,474 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:16,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1379907422, now seen corresponding path program 230 times [2021-05-03 14:35:16,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:16,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285391452] [2021-05-03 14:35:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:16,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285391452] [2021-05-03 14:35:16,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45878244] [2021-05-03 14:35:16,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:16,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:35:16,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:16,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:16,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:17,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:17,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:17,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:17,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:17,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:17,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:17,044 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:17,132 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:35:17,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:17,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:17,138 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:17,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:17,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:17,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:17,175 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:17,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:17,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:17,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:17,211 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:17,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:17,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:17,241 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:17,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:17,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:17,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:17,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313883141] [2021-05-03 14:35:17,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:17,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:17,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:17,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:17,349 INFO L87 Difference]: Start difference. First operand 130 states and 282 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:17,952 INFO L93 Difference]: Finished difference Result 182 states and 375 transitions. [2021-05-03 14:35:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:35:17,953 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:17,954 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:35:17,954 INFO L226 Difference]: Without dead ends: 163 [2021-05-03 14:35:17,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 761.7ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:35:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-03 14:35:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2021-05-03 14:35:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1904761904761907) internal successors, (276), 126 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 276 transitions. [2021-05-03 14:35:17,955 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 276 transitions. Word has length 18 [2021-05-03 14:35:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:17,955 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 276 transitions. [2021-05-03 14:35:17,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 276 transitions. [2021-05-03 14:35:17,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:17,956 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:17,956 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:18,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1236 [2021-05-03 14:35:18,156 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:18,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1944729062, now seen corresponding path program 231 times [2021-05-03 14:35:18,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:18,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631437445] [2021-05-03 14:35:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:18,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631437445] [2021-05-03 14:35:18,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190575618] [2021-05-03 14:35:18,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:18,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:35:18,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:18,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:18,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:18,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:18,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:18,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:18,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:18,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:18,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:18,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:18,635 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-05-03 14:35:18,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:18,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:35:18,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:18,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:18,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:18,652 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:18,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:18,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:18,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833248002] [2021-05-03 14:35:18,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:18,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:18,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:18,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:18,711 INFO L87 Difference]: Start difference. First operand 127 states and 276 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:19,059 INFO L93 Difference]: Finished difference Result 148 states and 309 transitions. [2021-05-03 14:35:19,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:35:19,060 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:19,061 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:35:19,061 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:35:19,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:35:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:35:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-05-03 14:35:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.188976377952756) internal successors, (278), 127 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 278 transitions. [2021-05-03 14:35:19,062 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 278 transitions. Word has length 18 [2021-05-03 14:35:19,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:19,062 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 278 transitions. [2021-05-03 14:35:19,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:19,062 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 278 transitions. [2021-05-03 14:35:19,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:19,063 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:19,063 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:19,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:19,263 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1488233170, now seen corresponding path program 232 times [2021-05-03 14:35:19,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:19,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731784725] [2021-05-03 14:35:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:19,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:19,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731784725] [2021-05-03 14:35:19,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533088315] [2021-05-03 14:35:19,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:19,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:35:19,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:19,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:19,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:19,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:19,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:19,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:19,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:19,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:19,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:19,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:19,857 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-05-03 14:35:19,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:19,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:19,863 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:19,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:19,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:19,875 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:19,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:19,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:19,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694667045] [2021-05-03 14:35:19,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:19,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:19,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:19,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:19,933 INFO L87 Difference]: Start difference. First operand 128 states and 278 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:20,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:20,490 INFO L93 Difference]: Finished difference Result 150 states and 317 transitions. [2021-05-03 14:35:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:35:20,491 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:20,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:20,492 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:35:20,492 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:35:20,492 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 696.2ms TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:35:20,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:35:20,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2021-05-03 14:35:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1875) internal successors, (280), 128 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 280 transitions. [2021-05-03 14:35:20,494 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 280 transitions. Word has length 18 [2021-05-03 14:35:20,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:20,494 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 280 transitions. [2021-05-03 14:35:20,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:20,494 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 280 transitions. [2021-05-03 14:35:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:20,494 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:20,494 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:20,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1242 [2021-05-03 14:35:20,695 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:20,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:20,695 INFO L82 PathProgramCache]: Analyzing trace with hash -352047898, now seen corresponding path program 233 times [2021-05-03 14:35:20,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:20,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974483773] [2021-05-03 14:35:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:20,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974483773] [2021-05-03 14:35:20,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043495019] [2021-05-03 14:35:20,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:20,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:35:20,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:20,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:21,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:21,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:21,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:21,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:21,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:21,156 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:21,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:21,160 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:21,240 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-05-03 14:35:21,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:21,246 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:21,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:21,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:21,252 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:21,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:21,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:21,287 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:21,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:21,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:21,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507190334] [2021-05-03 14:35:21,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:21,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:21,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:21,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:21,399 INFO L87 Difference]: Start difference. First operand 129 states and 280 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:22,099 INFO L93 Difference]: Finished difference Result 170 states and 346 transitions. [2021-05-03 14:35:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:35:22,099 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:22,100 INFO L225 Difference]: With dead ends: 170 [2021-05-03 14:35:22,100 INFO L226 Difference]: Without dead ends: 151 [2021-05-03 14:35:22,100 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 878.0ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:35:22,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-03 14:35:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 127. [2021-05-03 14:35:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1904761904761907) internal successors, (276), 126 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 276 transitions. [2021-05-03 14:35:22,101 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 276 transitions. Word has length 18 [2021-05-03 14:35:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:22,101 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 276 transitions. [2021-05-03 14:35:22,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:22,102 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 276 transitions. [2021-05-03 14:35:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:22,102 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:22,102 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:22,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-05-03 14:35:22,302 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:22,303 INFO L82 PathProgramCache]: Analyzing trace with hash 699950006, now seen corresponding path program 234 times [2021-05-03 14:35:22,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:22,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208455023] [2021-05-03 14:35:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:22,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208455023] [2021-05-03 14:35:22,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302204465] [2021-05-03 14:35:22,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:22,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:35:22,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:35:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:22,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:22,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:22,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:22,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:22,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:22,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:35:22,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:22,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:22,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:22,815 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:35:22,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:22,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:22,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:22,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484735749] [2021-05-03 14:35:22,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:22,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:22,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:22,869 INFO L87 Difference]: Start difference. First operand 127 states and 276 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:23,313 INFO L93 Difference]: Finished difference Result 147 states and 314 transitions. [2021-05-03 14:35:23,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:35:23,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:23,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:23,314 INFO L225 Difference]: With dead ends: 147 [2021-05-03 14:35:23,314 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:35:23,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 620.4ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:35:23,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:35:23,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2021-05-03 14:35:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.1968503937007875) internal successors, (279), 127 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:23,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 279 transitions. [2021-05-03 14:35:23,316 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 279 transitions. Word has length 18 [2021-05-03 14:35:23,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:23,316 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 279 transitions. [2021-05-03 14:35:23,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:23,316 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 279 transitions. [2021-05-03 14:35:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:23,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:23,316 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:23,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1246 [2021-05-03 14:35:23,517 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:23,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:23,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1836135278, now seen corresponding path program 235 times [2021-05-03 14:35:23,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:23,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68793722] [2021-05-03 14:35:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:23,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:23,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68793722] [2021-05-03 14:35:23,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467341475] [2021-05-03 14:35:23,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:23,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:23,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:24,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:24,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:24,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:24,032 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:24,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:24,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:24,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:24,042 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:24,124 INFO L628 ElimStorePlain]: treesize reduction 77, result has 46.5 percent of original size [2021-05-03 14:35:24,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:24,131 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:24,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:24,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:24,138 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:24,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:24,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:24,174 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:24,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:24,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:24,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676218078] [2021-05-03 14:35:24,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:24,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:24,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:24,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:24,288 INFO L87 Difference]: Start difference. First operand 128 states and 279 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,291 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-05-03 14:35:25,485 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2021-05-03 14:35:25,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:25,511 INFO L93 Difference]: Finished difference Result 221 states and 429 transitions. [2021-05-03 14:35:25,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:35:25,512 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:25,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:25,512 INFO L225 Difference]: With dead ends: 221 [2021-05-03 14:35:25,512 INFO L226 Difference]: Without dead ends: 195 [2021-05-03 14:35:25,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1386.5ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:35:25,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-03 14:35:25,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 129. [2021-05-03 14:35:25,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1953125) internal successors, (281), 128 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 281 transitions. [2021-05-03 14:35:25,514 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 281 transitions. Word has length 18 [2021-05-03 14:35:25,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:25,514 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 281 transitions. [2021-05-03 14:35:25,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:25,514 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 281 transitions. [2021-05-03 14:35:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:25,514 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:25,514 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:25,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1247,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:25,715 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:25,715 INFO L82 PathProgramCache]: Analyzing trace with hash -86104014, now seen corresponding path program 236 times [2021-05-03 14:35:25,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:25,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399906180] [2021-05-03 14:35:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:35:25,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399906180] [2021-05-03 14:35:25,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97433229] [2021-05-03 14:35:25,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:25,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:35:25,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:25,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:35:25,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:35:25,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:25,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-05-03 14:35:25,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645814161] [2021-05-03 14:35:25,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:35:25,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:25,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:35:25,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:35:25,985 INFO L87 Difference]: Start difference. First operand 129 states and 281 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:26,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:26,209 INFO L93 Difference]: Finished difference Result 141 states and 301 transitions. [2021-05-03 14:35:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:35:26,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:26,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:26,210 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:35:26,210 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:35:26,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:35:26,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:35:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 127. [2021-05-03 14:35:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1666666666666665) internal successors, (273), 126 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 273 transitions. [2021-05-03 14:35:26,211 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 273 transitions. Word has length 18 [2021-05-03 14:35:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:26,212 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 273 transitions. [2021-05-03 14:35:26,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 273 transitions. [2021-05-03 14:35:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:26,212 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:26,212 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:26,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1250,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:26,412 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:26,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash -310035482, now seen corresponding path program 237 times [2021-05-03 14:35:26,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:26,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602560049] [2021-05-03 14:35:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:26,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602560049] [2021-05-03 14:35:26,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2479389] [2021-05-03 14:35:26,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:26,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:35:26,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:26,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:26,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:26,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:26,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:26,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:26,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:26,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:26,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:26,984 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:35:26,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:26,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:26,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:27,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:27,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:27,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:27,031 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:27,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:27,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:27,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:27,071 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:27,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:27,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:27,105 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:27,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:27,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:27,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942878767] [2021-05-03 14:35:27,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:27,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:27,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:27,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:27,220 INFO L87 Difference]: Start difference. First operand 127 states and 273 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:27,879 INFO L93 Difference]: Finished difference Result 179 states and 366 transitions. [2021-05-03 14:35:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:35:27,880 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:27,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:27,880 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:35:27,880 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:35:27,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 656.0ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:35:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:35:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 127. [2021-05-03 14:35:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1666666666666665) internal successors, (273), 126 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 273 transitions. [2021-05-03 14:35:27,882 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 273 transitions. Word has length 18 [2021-05-03 14:35:27,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:27,882 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 273 transitions. [2021-05-03 14:35:27,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 273 transitions. [2021-05-03 14:35:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:27,883 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:27,883 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:28,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1260,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:28,083 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:28,083 INFO L82 PathProgramCache]: Analyzing trace with hash -185848274, now seen corresponding path program 238 times [2021-05-03 14:35:28,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:28,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512442445] [2021-05-03 14:35:28,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:28,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512442445] [2021-05-03 14:35:28,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407781783] [2021-05-03 14:35:28,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:28,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:35:28,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:28,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:28,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:28,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:28,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:28,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:28,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:28,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:28,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:28,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:28,616 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-05-03 14:35:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:28,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:35:28,620 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:28,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:28,632 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:28,632 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:28,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:28,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:28,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410306210] [2021-05-03 14:35:28,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:28,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:28,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:28,691 INFO L87 Difference]: Start difference. First operand 127 states and 273 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:29,196 INFO L93 Difference]: Finished difference Result 152 states and 318 transitions. [2021-05-03 14:35:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:35:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:29,197 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:35:29,197 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:35:29,197 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 591.6ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:35:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:35:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 130. [2021-05-03 14:35:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-05-03 14:35:29,199 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 18 [2021-05-03 14:35:29,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:29,199 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-05-03 14:35:29,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-05-03 14:35:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:29,199 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:29,199 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:29,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1265 [2021-05-03 14:35:29,400 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:29,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:29,400 INFO L82 PathProgramCache]: Analyzing trace with hash 950336998, now seen corresponding path program 239 times [2021-05-03 14:35:29,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:29,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756159150] [2021-05-03 14:35:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:29,812 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-05-03 14:35:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756159150] [2021-05-03 14:35:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760777328] [2021-05-03 14:35:29,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:29,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:35:29,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:29,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:29,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:30,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:30,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:30,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:30,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:30,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:30,046 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:30,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:30,051 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:30,134 INFO L628 ElimStorePlain]: treesize reduction 80, result has 45.6 percent of original size [2021-05-03 14:35:30,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:30,141 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:30,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:30,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:30,147 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:30,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:30,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:30,182 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:30,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:30,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:30,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657491446] [2021-05-03 14:35:30,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:30,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:30,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:30,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:30,297 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:30,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:30,831 INFO L93 Difference]: Finished difference Result 172 states and 347 transitions. [2021-05-03 14:35:30,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:35:30,832 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:30,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:30,832 INFO L225 Difference]: With dead ends: 172 [2021-05-03 14:35:30,832 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 14:35:30,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 948.5ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:35:30,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 14:35:30,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2021-05-03 14:35:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1640625) internal successors, (277), 128 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:30,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 277 transitions. [2021-05-03 14:35:30,834 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 277 transitions. Word has length 18 [2021-05-03 14:35:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:30,834 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 277 transitions. [2021-05-03 14:35:30,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 277 transitions. [2021-05-03 14:35:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:30,834 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:30,834 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:31,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1266 [2021-05-03 14:35:31,035 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:31,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:31,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1195833762, now seen corresponding path program 240 times [2021-05-03 14:35:31,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:31,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176079822] [2021-05-03 14:35:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:31,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176079822] [2021-05-03 14:35:31,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799151399] [2021-05-03 14:35:31,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:31,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:35:31,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:31,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:35:31,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:31,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:31,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:31,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:31,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:31,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:31,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:31,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:31,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:31,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:31,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:31,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:31,444 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:31,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:31,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:31,450 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:31,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:31,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:31,481 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:35:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:31,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:31,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:31,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447018429] [2021-05-03 14:35:31,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:31,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:31,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:31,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:31,592 INFO L87 Difference]: Start difference. First operand 129 states and 277 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:32,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:32,562 INFO L93 Difference]: Finished difference Result 200 states and 403 transitions. [2021-05-03 14:35:32,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:35:32,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:32,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:32,563 INFO L225 Difference]: With dead ends: 200 [2021-05-03 14:35:32,563 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:35:32,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1013.1ms TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:35:32,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:35:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 128. [2021-05-03 14:35:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.1653543307086616) internal successors, (275), 127 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 275 transitions. [2021-05-03 14:35:32,565 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 275 transitions. Word has length 18 [2021-05-03 14:35:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:32,565 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 275 transitions. [2021-05-03 14:35:32,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 275 transitions. [2021-05-03 14:35:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:32,565 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:32,566 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:32,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1269,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:32,766 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash 992349414, now seen corresponding path program 241 times [2021-05-03 14:35:32,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:32,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125707064] [2021-05-03 14:35:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125707064] [2021-05-03 14:35:32,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634542587] [2021-05-03 14:35:32,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:33,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:33,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:33,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:33,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:33,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:33,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:33,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:33,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:33,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:33,342 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:35:33,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:33,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:33,349 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:33,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:33,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:33,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:33,395 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:33,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:33,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:33,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:33,435 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:33,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:33,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:33,469 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:33,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:33,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:33,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162767971] [2021-05-03 14:35:33,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:33,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:33,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:33,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:33,581 INFO L87 Difference]: Start difference. First operand 128 states and 275 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:34,096 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-03 14:35:34,372 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2021-05-03 14:35:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:34,610 INFO L93 Difference]: Finished difference Result 226 states and 447 transitions. [2021-05-03 14:35:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:35:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:34,611 INFO L225 Difference]: With dead ends: 226 [2021-05-03 14:35:34,611 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 14:35:34,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1112.7ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:35:34,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 14:35:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 127. [2021-05-03 14:35:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1666666666666665) internal successors, (273), 126 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:34,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 273 transitions. [2021-05-03 14:35:34,613 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 273 transitions. Word has length 18 [2021-05-03 14:35:34,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:34,613 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 273 transitions. [2021-05-03 14:35:34,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 273 transitions. [2021-05-03 14:35:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:34,613 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:34,613 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:34,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:34,814 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:34,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:34,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1096106590, now seen corresponding path program 242 times [2021-05-03 14:35:34,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:34,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840197807] [2021-05-03 14:35:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:34,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:35,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840197807] [2021-05-03 14:35:35,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273637303] [2021-05-03 14:35:35,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:35,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:35:35,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:35,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:35:35,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:35,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:35,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:35,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:35,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:35,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:35,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:35:35,272 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:35,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:35,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:35,282 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:35:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:35,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:35,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:35:35,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132177532] [2021-05-03 14:35:35,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:35:35,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:35,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:35:35,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:35:35,333 INFO L87 Difference]: Start difference. First operand 127 states and 273 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:35,714 INFO L93 Difference]: Finished difference Result 152 states and 317 transitions. [2021-05-03 14:35:35,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:35:35,714 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:35,715 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:35:35,715 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 14:35:35,715 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:35:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 14:35:35,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 131. [2021-05-03 14:35:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.169230769230769) internal successors, (282), 130 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:35,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 282 transitions. [2021-05-03 14:35:35,716 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 282 transitions. Word has length 18 [2021-05-03 14:35:35,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:35,716 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 282 transitions. [2021-05-03 14:35:35,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:35,717 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 282 transitions. [2021-05-03 14:35:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:35,717 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:35,717 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:35,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1277 [2021-05-03 14:35:35,917 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:35,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1958111654, now seen corresponding path program 243 times [2021-05-03 14:35:35,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:35,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800541912] [2021-05-03 14:35:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:36,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:36,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800541912] [2021-05-03 14:35:36,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479625362] [2021-05-03 14:35:36,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:36,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:35:36,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:35:36,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:36,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:36,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:36,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:36,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:36,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:36,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:36,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:36,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:36,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:36,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:36,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:36,418 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:36,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:36,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:36,423 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:36,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:36,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:36,451 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:71, output treesize:29 [2021-05-03 14:35:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:36,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:36,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:36,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408590068] [2021-05-03 14:35:36,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:36,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:36,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:36,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:36,531 INFO L87 Difference]: Start difference. First operand 131 states and 282 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:37,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:37,240 INFO L93 Difference]: Finished difference Result 165 states and 342 transitions. [2021-05-03 14:35:37,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:35:37,241 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:37,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:37,241 INFO L225 Difference]: With dead ends: 165 [2021-05-03 14:35:37,242 INFO L226 Difference]: Without dead ends: 152 [2021-05-03 14:35:37,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 761.8ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:35:37,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-03 14:35:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2021-05-03 14:35:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.16793893129771) internal successors, (284), 131 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 284 transitions. [2021-05-03 14:35:37,244 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 284 transitions. Word has length 18 [2021-05-03 14:35:37,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:37,244 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 284 transitions. [2021-05-03 14:35:37,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 284 transitions. [2021-05-03 14:35:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:37,244 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:37,244 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:37,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1278 [2021-05-03 14:35:37,461 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1200670370, now seen corresponding path program 244 times [2021-05-03 14:35:37,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:37,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440659179] [2021-05-03 14:35:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:37,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440659179] [2021-05-03 14:35:37,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221563180] [2021-05-03 14:35:37,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:37,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:35:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:37,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:37,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:37,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:37,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:37,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:37,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:37,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:37,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:37,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:37,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:37,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:37,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:37,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:37,992 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:38,076 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-05-03 14:35:38,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:38,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:38,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:38,083 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:38,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:38,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:38,089 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:38,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:38,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:38,124 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:38,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:38,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:35:38,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975787562] [2021-05-03 14:35:38,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:35:38,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:38,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:35:38,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:35:38,231 INFO L87 Difference]: Start difference. First operand 132 states and 284 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:38,873 INFO L93 Difference]: Finished difference Result 190 states and 382 transitions. [2021-05-03 14:35:38,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:35:38,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:38,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:38,874 INFO L225 Difference]: With dead ends: 190 [2021-05-03 14:35:38,874 INFO L226 Difference]: Without dead ends: 171 [2021-05-03 14:35:38,874 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:35:38,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-03 14:35:38,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 130. [2021-05-03 14:35:38,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:38,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-05-03 14:35:38,876 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 18 [2021-05-03 14:35:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:38,876 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-05-03 14:35:38,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-05-03 14:35:38,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:38,876 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:38,876 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:39,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1281 [2021-05-03 14:35:39,081 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:39,081 INFO L82 PathProgramCache]: Analyzing trace with hash -148672466, now seen corresponding path program 245 times [2021-05-03 14:35:39,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:39,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618718371] [2021-05-03 14:35:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:39,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618718371] [2021-05-03 14:35:39,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646593756] [2021-05-03 14:35:39,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:39,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:35:39,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:39,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:39,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:39,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:39,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:39,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:39,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:39,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:39,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:39,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:39,564 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-05-03 14:35:39,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:39,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:39,569 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:39,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:39,580 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:39,580 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:39,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:39,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:39,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955672746] [2021-05-03 14:35:39,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:39,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:39,636 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:40,097 INFO L93 Difference]: Finished difference Result 157 states and 323 transitions. [2021-05-03 14:35:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:35:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:40,098 INFO L225 Difference]: With dead ends: 157 [2021-05-03 14:35:40,098 INFO L226 Difference]: Without dead ends: 138 [2021-05-03 14:35:40,098 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 595.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:35:40,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-03 14:35:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2021-05-03 14:35:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1526717557251906) internal successors, (282), 131 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 282 transitions. [2021-05-03 14:35:40,099 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 282 transitions. Word has length 18 [2021-05-03 14:35:40,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:40,099 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 282 transitions. [2021-05-03 14:35:40,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:40,099 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 282 transitions. [2021-05-03 14:35:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:40,100 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:40,100 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:40,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1284,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:40,309 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash 987512806, now seen corresponding path program 246 times [2021-05-03 14:35:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:40,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175806210] [2021-05-03 14:35:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:40,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175806210] [2021-05-03 14:35:40,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971968557] [2021-05-03 14:35:40,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:40,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:35:40,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:40,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:35:40,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:40,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:40,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:40,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:40,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:40,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:40,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:40,766 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:40,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:40,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:40,776 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:12 [2021-05-03 14:35:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:40,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:40,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:40,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262206607] [2021-05-03 14:35:40,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:40,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:40,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:40,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:40,858 INFO L87 Difference]: Start difference. First operand 132 states and 282 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:41,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:41,526 INFO L93 Difference]: Finished difference Result 148 states and 312 transitions. [2021-05-03 14:35:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:35:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:41,527 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:35:41,527 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:35:41,527 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 787.6ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:35:41,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:35:41,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 133. [2021-05-03 14:35:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-05-03 14:35:41,529 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 18 [2021-05-03 14:35:41,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:41,529 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-05-03 14:35:41,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-05-03 14:35:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:41,529 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:41,529 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:41,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:41,730 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:41,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:41,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1158657954, now seen corresponding path program 247 times [2021-05-03 14:35:41,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:41,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222280361] [2021-05-03 14:35:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:41,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:41,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222280361] [2021-05-03 14:35:41,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113726603] [2021-05-03 14:35:41,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:41,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:41,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:42,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:42,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:42,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:42,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:42,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:42,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:42,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:42,283 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:35:42,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:42,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:42,290 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:42,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:42,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:42,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:42,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:42,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:42,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:42,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:42,385 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:42,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:42,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:42,419 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:42,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:42,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:42,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567857040] [2021-05-03 14:35:42,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:42,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:42,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:42,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:42,536 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:43,282 INFO L93 Difference]: Finished difference Result 195 states and 399 transitions. [2021-05-03 14:35:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:35:43,283 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:43,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:43,284 INFO L225 Difference]: With dead ends: 195 [2021-05-03 14:35:43,284 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:35:43,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 854.9ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:35:43,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:35:43,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 133. [2021-05-03 14:35:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-05-03 14:35:43,285 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 18 [2021-05-03 14:35:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:43,285 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-05-03 14:35:43,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-05-03 14:35:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:43,286 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:43,286 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:43,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-05-03 14:35:43,487 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:43,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1034470746, now seen corresponding path program 248 times [2021-05-03 14:35:43,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:43,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664602945] [2021-05-03 14:35:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:43,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:43,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664602945] [2021-05-03 14:35:43,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805867613] [2021-05-03 14:35:43,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:43,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:35:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:43,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:35:43,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:43,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:43,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:43,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:43,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:43,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:43,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:43,956 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:43,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:43,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:43,966 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:35:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:44,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:44,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:44,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971965854] [2021-05-03 14:35:44,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:44,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:44,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:44,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:44,023 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:44,536 INFO L93 Difference]: Finished difference Result 155 states and 328 transitions. [2021-05-03 14:35:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:35:44,536 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:44,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:44,537 INFO L225 Difference]: With dead ends: 155 [2021-05-03 14:35:44,537 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:35:44,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 553.6ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:35:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:35:44,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 136. [2021-05-03 14:35:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1703703703703705) internal successors, (293), 135 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 293 transitions. [2021-05-03 14:35:44,538 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 293 transitions. Word has length 18 [2021-05-03 14:35:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:44,538 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 293 transitions. [2021-05-03 14:35:44,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:44,538 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 293 transitions. [2021-05-03 14:35:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:44,539 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:44,539 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:44,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:44,739 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:44,740 INFO L82 PathProgramCache]: Analyzing trace with hash 101714526, now seen corresponding path program 249 times [2021-05-03 14:35:44,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:44,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158478951] [2021-05-03 14:35:44,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:44,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158478951] [2021-05-03 14:35:44,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383857403] [2021-05-03 14:35:44,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:44,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:35:44,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:35:44,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:45,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:45,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:45,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:45,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:45,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:45,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:45,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:45,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:45,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:45,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:45,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:45,171 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:45,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:45,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:45,176 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:45,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:45,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:45,209 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:35:45,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:45,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:45,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:35:45,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744858115] [2021-05-03 14:35:45,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:35:45,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:35:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:35:45,330 INFO L87 Difference]: Start difference. First operand 136 states and 293 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:45,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:45,864 INFO L93 Difference]: Finished difference Result 158 states and 330 transitions. [2021-05-03 14:35:45,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:35:45,864 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:45,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:45,865 INFO L225 Difference]: With dead ends: 158 [2021-05-03 14:35:45,865 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:35:45,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 614.8ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:35:45,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:35:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2021-05-03 14:35:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.176470588235294) internal successors, (296), 136 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:45,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 296 transitions. [2021-05-03 14:35:45,866 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 296 transitions. Word has length 18 [2021-05-03 14:35:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:45,867 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 296 transitions. [2021-05-03 14:35:45,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 296 transitions. [2021-05-03 14:35:45,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:45,867 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:45,867 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:46,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1292 [2021-05-03 14:35:46,073 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2044456234, now seen corresponding path program 250 times [2021-05-03 14:35:46,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:46,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412689581] [2021-05-03 14:35:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:46,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412689581] [2021-05-03 14:35:46,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645611285] [2021-05-03 14:35:46,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:46,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:35:46,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:46,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:46,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:46,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:46,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:46,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:46,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:46,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:46,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:46,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:46,643 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:35:46,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:46,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:46,649 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:46,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:46,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:46,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:46,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:46,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:46,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:46,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:46,734 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:46,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:46,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:46,769 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:46,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:46,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:46,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857280003] [2021-05-03 14:35:46,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:46,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:46,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:46,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:46,881 INFO L87 Difference]: Start difference. First operand 137 states and 296 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:47,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:47,707 INFO L93 Difference]: Finished difference Result 204 states and 411 transitions. [2021-05-03 14:35:47,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:35:47,708 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:47,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:47,709 INFO L225 Difference]: With dead ends: 204 [2021-05-03 14:35:47,709 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 14:35:47,709 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 958.4ms TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:35:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 14:35:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 137. [2021-05-03 14:35:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.176470588235294) internal successors, (296), 136 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:47,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 296 transitions. [2021-05-03 14:35:47,711 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 296 transitions. Word has length 18 [2021-05-03 14:35:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:47,711 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 296 transitions. [2021-05-03 14:35:47,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 296 transitions. [2021-05-03 14:35:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:47,712 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:47,712 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:47,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-05-03 14:35:47,918 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:47,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:47,918 INFO L82 PathProgramCache]: Analyzing trace with hash 143726942, now seen corresponding path program 251 times [2021-05-03 14:35:47,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:47,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738309997] [2021-05-03 14:35:47,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:48,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738309997] [2021-05-03 14:35:48,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457106407] [2021-05-03 14:35:48,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:48,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:35:48,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:48,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:48,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:48,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:48,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:48,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:48,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:48,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:48,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:48,493 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:48,591 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-05-03 14:35:48,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:48,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:48,596 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:48,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:48,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:48,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:48,644 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:48,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:48,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:48,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:48,686 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:48,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:48,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:48,720 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:48,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:48,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:48,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627016901] [2021-05-03 14:35:48,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:48,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:48,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:48,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:48,835 INFO L87 Difference]: Start difference. First operand 137 states and 296 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:49,654 INFO L93 Difference]: Finished difference Result 191 states and 393 transitions. [2021-05-03 14:35:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:35:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:49,655 INFO L225 Difference]: With dead ends: 191 [2021-05-03 14:35:49,655 INFO L226 Difference]: Without dead ends: 172 [2021-05-03 14:35:49,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 980.0ms TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:35:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-03 14:35:49,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2021-05-03 14:35:49,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1824817518248176) internal successors, (299), 137 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:49,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 299 transitions. [2021-05-03 14:35:49,657 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 299 transitions. Word has length 18 [2021-05-03 14:35:49,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:49,657 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 299 transitions. [2021-05-03 14:35:49,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:49,657 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 299 transitions. [2021-05-03 14:35:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:49,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:49,658 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:49,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-05-03 14:35:49,858 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:49,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:49,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1570553646, now seen corresponding path program 252 times [2021-05-03 14:35:49,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:49,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452938409] [2021-05-03 14:35:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:49,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:50,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:50,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452938409] [2021-05-03 14:35:50,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606334235] [2021-05-03 14:35:50,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:50,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:35:50,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:50,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:50,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:50,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:50,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:50,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:50,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:50,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:50,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:50,269 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:50,303 INFO L628 ElimStorePlain]: treesize reduction 36, result has 42.9 percent of original size [2021-05-03 14:35:50,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:50,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:50,308 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:50,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:50,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:50,319 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:50,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:50,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:50,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294943989] [2021-05-03 14:35:50,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:50,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:50,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:50,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:50,378 INFO L87 Difference]: Start difference. First operand 138 states and 299 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:50,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:50,782 INFO L93 Difference]: Finished difference Result 161 states and 340 transitions. [2021-05-03 14:35:50,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:35:50,783 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:50,783 INFO L225 Difference]: With dead ends: 161 [2021-05-03 14:35:50,783 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:35:50,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:35:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:35:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 142. [2021-05-03 14:35:50,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1773049645390072) internal successors, (307), 141 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:50,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 307 transitions. [2021-05-03 14:35:50,785 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 307 transitions. Word has length 18 [2021-05-03 14:35:50,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:50,785 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 307 transitions. [2021-05-03 14:35:50,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:50,785 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 307 transitions. [2021-05-03 14:35:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:50,785 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:50,785 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:50,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:50,986 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:50,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:50,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1588228378, now seen corresponding path program 253 times [2021-05-03 14:35:50,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:50,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70082131] [2021-05-03 14:35:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70082131] [2021-05-03 14:35:51,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492924063] [2021-05-03 14:35:51,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:51,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:51,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:51,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:51,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:51,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:51,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:51,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:51,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:51,447 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:51,536 INFO L628 ElimStorePlain]: treesize reduction 83, result has 43.5 percent of original size [2021-05-03 14:35:51,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:51,543 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:51,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:51,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:51,549 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:51,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:51,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:51,584 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:51,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:51,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:35:51,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314148257] [2021-05-03 14:35:51,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:35:51,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:51,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:35:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:35:51,688 INFO L87 Difference]: Start difference. First operand 142 states and 307 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:52,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:52,208 INFO L93 Difference]: Finished difference Result 180 states and 367 transitions. [2021-05-03 14:35:52,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:35:52,209 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:52,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:52,209 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:35:52,209 INFO L226 Difference]: Without dead ends: 161 [2021-05-03 14:35:52,209 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 643.6ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:35:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-03 14:35:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 141. [2021-05-03 14:35:52,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1785714285714284) internal successors, (305), 140 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 305 transitions. [2021-05-03 14:35:52,211 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 305 transitions. Word has length 18 [2021-05-03 14:35:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:52,211 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 305 transitions. [2021-05-03 14:35:52,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:52,211 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 305 transitions. [2021-05-03 14:35:52,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:52,211 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:52,211 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:52,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1308,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:52,413 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:52,413 INFO L82 PathProgramCache]: Analyzing trace with hash 560568158, now seen corresponding path program 254 times [2021-05-03 14:35:52,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:52,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685057035] [2021-05-03 14:35:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:52,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685057035] [2021-05-03 14:35:52,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486975428] [2021-05-03 14:35:52,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:52,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:35:52,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:52,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:35:52,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:52,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:52,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:52,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:52,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:52,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:52,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:52,899 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:52,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:52,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:52,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:52,956 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:52,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:52,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:52,963 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:52,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:52,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:52,998 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:35:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:53,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:53,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:53,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425266765] [2021-05-03 14:35:53,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:53,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:53,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:53,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:53,117 INFO L87 Difference]: Start difference. First operand 141 states and 305 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:54,059 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 14:35:54,211 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:35:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:54,251 INFO L93 Difference]: Finished difference Result 208 states and 423 transitions. [2021-05-03 14:35:54,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:35:54,252 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:54,252 INFO L225 Difference]: With dead ends: 208 [2021-05-03 14:35:54,252 INFO L226 Difference]: Without dead ends: 185 [2021-05-03 14:35:54,252 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1205.8ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:35:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-03 14:35:54,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 140. [2021-05-03 14:35:54,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.179856115107914) internal successors, (303), 139 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 303 transitions. [2021-05-03 14:35:54,254 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 303 transitions. Word has length 18 [2021-05-03 14:35:54,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:54,254 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 303 transitions. [2021-05-03 14:35:54,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 303 transitions. [2021-05-03 14:35:54,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:54,254 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:54,254 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:54,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-05-03 14:35:54,476 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:54,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1546215962, now seen corresponding path program 255 times [2021-05-03 14:35:54,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:54,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893728966] [2021-05-03 14:35:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:54,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:54,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893728966] [2021-05-03 14:35:54,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953115608] [2021-05-03 14:35:54,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:54,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:35:54,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:54,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:54,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:55,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:55,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:55,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:55,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:55,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:55,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:55,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:55,203 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 14:35:55,204 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:35:55,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:55,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:55,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:55,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:55,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:55,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:35:55,256 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:55,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:55,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:55,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:55,296 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:55,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:55,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:55,331 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:55,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:55,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:55,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384852610] [2021-05-03 14:35:55,451 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:55,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:55,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:55,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:55,451 INFO L87 Difference]: Start difference. First operand 140 states and 303 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:56,129 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 14:35:56,486 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-05-03 14:35:56,665 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 14:35:56,822 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:35:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:56,847 INFO L93 Difference]: Finished difference Result 233 states and 465 transitions. [2021-05-03 14:35:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:35:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:56,849 INFO L225 Difference]: With dead ends: 233 [2021-05-03 14:35:56,849 INFO L226 Difference]: Without dead ends: 200 [2021-05-03 14:35:56,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1552.4ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:35:56,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-03 14:35:56,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2021-05-03 14:35:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-05-03 14:35:56,850 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 18 [2021-05-03 14:35:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:56,851 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-05-03 14:35:56,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:56,851 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-05-03 14:35:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:56,851 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:56,851 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:57,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:57,051 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:57,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1862953054, now seen corresponding path program 256 times [2021-05-03 14:35:57,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:57,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815907910] [2021-05-03 14:35:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:57,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815907910] [2021-05-03 14:35:57,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070883736] [2021-05-03 14:35:57,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:57,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:35:57,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:57,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:57,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:57,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:57,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:57,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:57,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:57,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:57,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:57,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:57,797 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-05-03 14:35:57,797 INFO L628 ElimStorePlain]: treesize reduction 85, result has 45.9 percent of original size [2021-05-03 14:35:57,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:57,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:57,803 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:57,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:57,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:57,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:35:57,848 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:57,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:57,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:57,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:35:57,887 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:35:57,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:57,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:35:57,921 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:35:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:58,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:58,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:35:58,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816085724] [2021-05-03 14:35:58,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:35:58,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:58,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:35:58,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:35:58,049 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:58,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:35:58,793 INFO L93 Difference]: Finished difference Result 195 states and 402 transitions. [2021-05-03 14:35:58,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:35:58,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:35:58,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:35:58,795 INFO L225 Difference]: With dead ends: 195 [2021-05-03 14:35:58,795 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:35:58,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 947.5ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:35:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:35:58,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 140. [2021-05-03 14:35:58,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1870503597122304) internal successors, (304), 139 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-05-03 14:35:58,796 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 18 [2021-05-03 14:35:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:35:58,796 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-05-03 14:35:58,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:35:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-05-03 14:35:58,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:35:58,797 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:35:58,797 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:35:59,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1319 [2021-05-03 14:35:59,001 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:35:59,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:35:59,001 INFO L82 PathProgramCache]: Analyzing trace with hash 289867306, now seen corresponding path program 257 times [2021-05-03 14:35:59,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:35:59,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019487080] [2021-05-03 14:35:59,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:35:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:35:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:59,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019487080] [2021-05-03 14:35:59,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623559684] [2021-05-03 14:35:59,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:35:59,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:35:59,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:35:59,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:35:59,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:35:59,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:59,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:59,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:59,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:59,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:59,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:35:59,383 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:59,421 INFO L628 ElimStorePlain]: treesize reduction 42, result has 44.0 percent of original size [2021-05-03 14:35:59,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:35:59,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:35:59,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:35:59,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:35:59,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:35:59,439 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:35:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:35:59,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:35:59,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:35:59,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12678322] [2021-05-03 14:35:59,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:35:59,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:35:59,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:35:59,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:35:59,496 INFO L87 Difference]: Start difference. First operand 140 states and 304 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:00,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:00,105 INFO L93 Difference]: Finished difference Result 184 states and 381 transitions. [2021-05-03 14:36:00,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:36:00,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:00,106 INFO L225 Difference]: With dead ends: 184 [2021-05-03 14:36:00,106 INFO L226 Difference]: Without dead ends: 159 [2021-05-03 14:36:00,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 585.8ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:36:00,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-03 14:36:00,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2021-05-03 14:36:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1857142857142855) internal successors, (306), 140 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:00,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-05-03 14:36:00,108 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 18 [2021-05-03 14:36:00,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:00,108 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-05-03 14:36:00,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:00,108 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-05-03 14:36:00,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:00,109 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:00,109 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:00,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1324 [2021-05-03 14:36:00,313 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:00,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:00,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1151872370, now seen corresponding path program 258 times [2021-05-03 14:36:00,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:00,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304781905] [2021-05-03 14:36:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:00,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304781905] [2021-05-03 14:36:00,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840164360] [2021-05-03 14:36:00,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:00,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:36:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:00,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:00,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:00,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:00,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:00,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:36:00,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:00,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:00,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:36:00,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:00,870 INFO L628 ElimStorePlain]: treesize reduction 36, result has 47.8 percent of original size [2021-05-03 14:36:00,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:00,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:36:00,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:00,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:00,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:36:00,887 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:36:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:00,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:00,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:00,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138486180] [2021-05-03 14:36:00,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:00,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:00,948 INFO L87 Difference]: Start difference. First operand 141 states and 306 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:01,558 INFO L93 Difference]: Finished difference Result 169 states and 356 transitions. [2021-05-03 14:36:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:36:01,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:01,559 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:36:01,559 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:36:01,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 784.1ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:36:01,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:36:01,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2021-05-03 14:36:01,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1843971631205674) internal successors, (308), 141 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:01,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 308 transitions. [2021-05-03 14:36:01,561 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 308 transitions. Word has length 18 [2021-05-03 14:36:01,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:01,561 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 308 transitions. [2021-05-03 14:36:01,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:01,561 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 308 transitions. [2021-05-03 14:36:01,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:01,561 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:01,561 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:01,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-05-03 14:36:01,762 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:01,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:01,762 INFO L82 PathProgramCache]: Analyzing trace with hash -2006909654, now seen corresponding path program 259 times [2021-05-03 14:36:01,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:01,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293311581] [2021-05-03 14:36:01,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:01,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:02,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293311581] [2021-05-03 14:36:02,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768959100] [2021-05-03 14:36:02,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:02,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:02,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:02,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:02,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:02,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:02,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:02,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:02,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:02,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:02,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:02,337 INFO L628 ElimStorePlain]: treesize reduction 83, result has 45.8 percent of original size [2021-05-03 14:36:02,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:02,344 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:02,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:02,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:02,351 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:02,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:02,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:02,385 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:02,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:02,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:02,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:02,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24783743] [2021-05-03 14:36:02,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:02,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:02,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:02,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:02,497 INFO L87 Difference]: Start difference. First operand 142 states and 308 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:03,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:03,344 INFO L93 Difference]: Finished difference Result 194 states and 396 transitions. [2021-05-03 14:36:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:36:03,345 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:03,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:03,345 INFO L225 Difference]: With dead ends: 194 [2021-05-03 14:36:03,345 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 14:36:03,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 959.2ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:36:03,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 14:36:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 140. [2021-05-03 14:36:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1870503597122304) internal successors, (304), 139 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:03,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 304 transitions. [2021-05-03 14:36:03,347 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 304 transitions. Word has length 18 [2021-05-03 14:36:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:03,347 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 304 transitions. [2021-05-03 14:36:03,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 304 transitions. [2021-05-03 14:36:03,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:03,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:03,347 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:03,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:03,548 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:03,548 INFO L82 PathProgramCache]: Analyzing trace with hash -954911750, now seen corresponding path program 260 times [2021-05-03 14:36:03,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:03,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401562389] [2021-05-03 14:36:03,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:03,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:03,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401562389] [2021-05-03 14:36:03,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029773384] [2021-05-03 14:36:03,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:03,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:03,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:03,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:36:03,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:03,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:03,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:36:03,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:03,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:03,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:03,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-05-03 14:36:03,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:04,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:04,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:36:04,011 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:36:04,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:04,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:04,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:04,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37519061] [2021-05-03 14:36:04,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:04,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:04,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:04,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:04,072 INFO L87 Difference]: Start difference. First operand 140 states and 304 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:04,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:04,620 INFO L93 Difference]: Finished difference Result 166 states and 352 transitions. [2021-05-03 14:36:04,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:36:04,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:04,621 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:36:04,621 INFO L226 Difference]: Without dead ends: 159 [2021-05-03 14:36:04,621 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:36:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-03 14:36:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2021-05-03 14:36:04,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:04,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-05-03 14:36:04,622 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 18 [2021-05-03 14:36:04,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:04,622 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-05-03 14:36:04,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:04,623 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-05-03 14:36:04,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:04,623 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:04,623 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:04,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1329 [2021-05-03 14:36:04,823 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:04,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:04,824 INFO L82 PathProgramCache]: Analyzing trace with hash 181273522, now seen corresponding path program 261 times [2021-05-03 14:36:04,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:04,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371549979] [2021-05-03 14:36:04,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371549979] [2021-05-03 14:36:05,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876507926] [2021-05-03 14:36:05,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:05,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:36:05,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:05,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:36:05,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:05,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:05,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:05,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:05,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:05,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:05,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:05,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:05,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:05,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:05,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:05,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:05,347 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:05,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:05,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:05,353 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:05,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:05,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:05,384 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:36:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:05,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:05,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:05,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246131977] [2021-05-03 14:36:05,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:05,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:05,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:05,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:05,528 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:06,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:06,123 INFO L93 Difference]: Finished difference Result 169 states and 357 transitions. [2021-05-03 14:36:06,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:36:06,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:06,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:06,124 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:36:06,124 INFO L226 Difference]: Without dead ends: 162 [2021-05-03 14:36:06,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 834.4ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:36:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-03 14:36:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 142. [2021-05-03 14:36:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-05-03 14:36:06,126 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 18 [2021-05-03 14:36:06,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:06,126 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-05-03 14:36:06,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:06,126 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-05-03 14:36:06,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:06,127 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:06,127 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:06,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1330,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:06,341 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:06,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1964897238, now seen corresponding path program 262 times [2021-05-03 14:36:06,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:06,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753227552] [2021-05-03 14:36:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:06,584 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:06,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753227552] [2021-05-03 14:36:06,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30634572] [2021-05-03 14:36:06,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:06,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:36:06,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:06,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:06,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:06,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:06,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:06,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:06,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:06,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:06,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:06,895 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:36:06,895 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-05-03 14:36:06,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:06,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:06,902 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:06,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:06,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:06,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:06,944 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:06,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:06,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:06,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:06,985 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:07,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:07,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:07,021 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:07,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:07,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:07,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738955588] [2021-05-03 14:36:07,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:07,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:07,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:07,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:07,135 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:07,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:07,935 INFO L93 Difference]: Finished difference Result 207 states and 427 transitions. [2021-05-03 14:36:07,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:36:07,935 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:07,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:07,936 INFO L225 Difference]: With dead ends: 207 [2021-05-03 14:36:07,936 INFO L226 Difference]: Without dead ends: 188 [2021-05-03 14:36:07,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 869.3ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:36:07,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-03 14:36:07,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 142. [2021-05-03 14:36:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-05-03 14:36:07,937 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 18 [2021-05-03 14:36:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:07,937 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-05-03 14:36:07,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-05-03 14:36:07,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:07,938 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:07,938 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:08,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-05-03 14:36:08,138 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:08,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1840710030, now seen corresponding path program 263 times [2021-05-03 14:36:08,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:08,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100313663] [2021-05-03 14:36:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:08,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:08,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100313663] [2021-05-03 14:36:08,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490481992] [2021-05-03 14:36:08,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:08,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:36:08,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:08,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:08,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:08,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:08,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:36:08,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:08,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:08,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:36:08,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:08,651 INFO L628 ElimStorePlain]: treesize reduction 48, result has 36.0 percent of original size [2021-05-03 14:36:08,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:08,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:08,656 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:08,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:08,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:36:08,669 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:36:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:08,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:08,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:08,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588017528] [2021-05-03 14:36:08,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:08,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:08,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:08,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:08,728 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:09,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:09,296 INFO L93 Difference]: Finished difference Result 175 states and 363 transitions. [2021-05-03 14:36:09,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:36:09,297 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:09,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:09,297 INFO L225 Difference]: With dead ends: 175 [2021-05-03 14:36:09,297 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:36:09,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 652.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:36:09,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:36:09,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 145. [2021-05-03 14:36:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1805555555555554) internal successors, (314), 144 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:09,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 314 transitions. [2021-05-03 14:36:09,299 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 314 transitions. Word has length 18 [2021-05-03 14:36:09,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:09,299 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 314 transitions. [2021-05-03 14:36:09,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 314 transitions. [2021-05-03 14:36:09,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:09,299 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:09,299 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:09,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1340,264 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:09,500 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:09,500 INFO L82 PathProgramCache]: Analyzing trace with hash -704524758, now seen corresponding path program 264 times [2021-05-03 14:36:09,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:09,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210121167] [2021-05-03 14:36:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:09,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:09,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210121167] [2021-05-03 14:36:09,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515480414] [2021-05-03 14:36:09,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:09,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:36:09,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:09,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:36:09,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:09,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:09,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:09,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:09,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:09,974 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:10,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:10,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:10,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:10,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:10,019 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:10,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:10,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:10,027 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:10,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:10,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:10,060 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:36:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:10,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:10,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:10,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545093529] [2021-05-03 14:36:10,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:10,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:10,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:10,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:10,203 INFO L87 Difference]: Start difference. First operand 145 states and 314 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:11,142 INFO L93 Difference]: Finished difference Result 204 states and 417 transitions. [2021-05-03 14:36:11,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:36:11,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:11,143 INFO L225 Difference]: With dead ends: 204 [2021-05-03 14:36:11,143 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:36:11,143 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1112.7ms TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:36:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:36:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 145. [2021-05-03 14:36:11,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-05-03 14:36:11,145 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 18 [2021-05-03 14:36:11,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:11,145 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-05-03 14:36:11,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:11,145 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-05-03 14:36:11,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:11,145 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:11,145 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:11,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-05-03 14:36:11,346 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1444271778, now seen corresponding path program 265 times [2021-05-03 14:36:11,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:11,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687602573] [2021-05-03 14:36:11,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:11,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:11,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:11,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687602573] [2021-05-03 14:36:11,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512475714] [2021-05-03 14:36:11,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:11,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:11,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:11,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:11,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:11,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:11,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:11,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:11,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:11,893 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 14:36:11,894 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:36:11,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:11,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:11,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:11,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:11,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:11,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:11,944 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:11,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:11,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:11,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:11,986 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:12,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:12,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:12,021 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:12,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:12,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:12,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:12,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199038908] [2021-05-03 14:36:12,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:12,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:12,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:12,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:12,136 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:13,021 INFO L93 Difference]: Finished difference Result 229 states and 465 transitions. [2021-05-03 14:36:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:36:13,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:13,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:13,022 INFO L225 Difference]: With dead ends: 229 [2021-05-03 14:36:13,022 INFO L226 Difference]: Without dead ends: 203 [2021-05-03 14:36:13,022 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 975.6ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:36:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-05-03 14:36:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2021-05-03 14:36:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.195804195804196) internal successors, (314), 143 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:13,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 314 transitions. [2021-05-03 14:36:13,024 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 314 transitions. Word has length 18 [2021-05-03 14:36:13,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:13,024 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 314 transitions. [2021-05-03 14:36:13,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 314 transitions. [2021-05-03 14:36:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:13,024 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:13,024 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:13,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1346 [2021-05-03 14:36:13,225 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:13,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:13,225 INFO L82 PathProgramCache]: Analyzing trace with hash -662512342, now seen corresponding path program 266 times [2021-05-03 14:36:13,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:13,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24577671] [2021-05-03 14:36:13,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:13,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24577671] [2021-05-03 14:36:13,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120021338] [2021-05-03 14:36:13,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:13,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:13,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:13,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:36:13,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:13,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:13,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:13,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:13,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:13,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:13,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:13,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:13,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:13,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:13,747 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:13,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:13,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:13,753 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:13,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:13,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:13,786 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:77, output treesize:35 [2021-05-03 14:36:13,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:13,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:13,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:13,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821920892] [2021-05-03 14:36:13,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:13,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:13,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:13,906 INFO L87 Difference]: Start difference. First operand 144 states and 314 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:14,871 INFO L93 Difference]: Finished difference Result 190 states and 405 transitions. [2021-05-03 14:36:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:36:14,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:14,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:14,872 INFO L225 Difference]: With dead ends: 190 [2021-05-03 14:36:14,872 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:36:14,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1040.7ms TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:36:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:36:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 146. [2021-05-03 14:36:14,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.206896551724138) internal successors, (320), 145 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:14,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 320 transitions. [2021-05-03 14:36:14,874 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 320 transitions. Word has length 18 [2021-05-03 14:36:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:14,874 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 320 transitions. [2021-05-03 14:36:14,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 320 transitions. [2021-05-03 14:36:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:14,874 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:14,874 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:15,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1351,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:15,075 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:15,075 INFO L82 PathProgramCache]: Analyzing trace with hash 764314362, now seen corresponding path program 267 times [2021-05-03 14:36:15,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:15,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246100034] [2021-05-03 14:36:15,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:15,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:15,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246100034] [2021-05-03 14:36:15,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589974224] [2021-05-03 14:36:15,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:15,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:36:15,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:15,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:15,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:15,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:36:15,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:15,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:15,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:36:15,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:15,513 INFO L628 ElimStorePlain]: treesize reduction 42, result has 39.1 percent of original size [2021-05-03 14:36:15,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:15,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:15,518 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:15,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:15,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:36:15,530 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:87, output treesize:14 [2021-05-03 14:36:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:15,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:15,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:15,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526923279] [2021-05-03 14:36:15,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:15,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:15,592 INFO L87 Difference]: Start difference. First operand 146 states and 320 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:16,169 INFO L93 Difference]: Finished difference Result 178 states and 377 transitions. [2021-05-03 14:36:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:36:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:16,170 INFO L225 Difference]: With dead ends: 178 [2021-05-03 14:36:16,170 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:36:16,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 621.4ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:36:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:36:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 150. [2021-05-03 14:36:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.2013422818791946) internal successors, (328), 149 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:16,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 328 transitions. [2021-05-03 14:36:16,172 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 328 transitions. Word has length 18 [2021-05-03 14:36:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:16,172 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 328 transitions. [2021-05-03 14:36:16,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:16,172 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 328 transitions. [2021-05-03 14:36:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:16,172 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:16,172 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:16,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-05-03 14:36:16,373 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:16,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:16,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1900499634, now seen corresponding path program 268 times [2021-05-03 14:36:16,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:16,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161317169] [2021-05-03 14:36:16,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:16,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161317169] [2021-05-03 14:36:16,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93769880] [2021-05-03 14:36:16,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:16,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:36:16,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:16,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:16,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:16,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:16,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:16,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:16,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:16,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:16,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:16,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:16,833 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:16,921 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-05-03 14:36:16,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:16,929 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:16,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:16,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:16,935 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:16,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:16,975 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:16,975 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:17,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:17,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:36:17,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501662813] [2021-05-03 14:36:17,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:17,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:17,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:17,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:17,098 INFO L87 Difference]: Start difference. First operand 150 states and 328 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:17,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:17,891 INFO L93 Difference]: Finished difference Result 201 states and 411 transitions. [2021-05-03 14:36:17,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:36:17,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:17,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:17,892 INFO L225 Difference]: With dead ends: 201 [2021-05-03 14:36:17,892 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:36:17,893 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 830.2ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:36:17,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:36:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 149. [2021-05-03 14:36:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.195945945945946) internal successors, (325), 148 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:17,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 325 transitions. [2021-05-03 14:36:17,894 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 325 transitions. Word has length 18 [2021-05-03 14:36:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:17,894 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 325 transitions. [2021-05-03 14:36:17,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 325 transitions. [2021-05-03 14:36:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:17,895 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:17,895 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:18,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-05-03 14:36:18,095 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:18,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:18,095 INFO L82 PathProgramCache]: Analyzing trace with hash -245671126, now seen corresponding path program 269 times [2021-05-03 14:36:18,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:18,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903330264] [2021-05-03 14:36:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:18,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903330264] [2021-05-03 14:36:18,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709909271] [2021-05-03 14:36:18,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:18,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:36:18,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:18,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:18,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:18,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:18,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:18,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:18,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:18,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:18,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:18,738 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:36:18,738 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-05-03 14:36:18,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:18,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:18,745 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:18,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:18,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:18,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:18,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:18,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:18,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:18,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:18,835 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:18,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:18,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:18,871 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:19,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:19,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:19,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126741033] [2021-05-03 14:36:19,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:19,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:19,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:19,001 INFO L87 Difference]: Start difference. First operand 149 states and 325 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:20,039 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 14:36:20,208 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:36:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:20,245 INFO L93 Difference]: Finished difference Result 240 states and 486 transitions. [2021-05-03 14:36:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:36:20,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:20,246 INFO L225 Difference]: With dead ends: 240 [2021-05-03 14:36:20,246 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 14:36:20,247 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 1356.4ms TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:36:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 14:36:20,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 148. [2021-05-03 14:36:20,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.197278911564626) internal successors, (323), 147 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:20,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 323 transitions. [2021-05-03 14:36:20,248 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 323 transitions. Word has length 18 [2021-05-03 14:36:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:20,248 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 323 transitions. [2021-05-03 14:36:20,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 323 transitions. [2021-05-03 14:36:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:20,249 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:20,249 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:20,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1358,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:20,449 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:20,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1942512050, now seen corresponding path program 270 times [2021-05-03 14:36:20,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:20,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272649080] [2021-05-03 14:36:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:20,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:20,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272649080] [2021-05-03 14:36:20,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804958774] [2021-05-03 14:36:20,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:20,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:36:20,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:20,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:36:20,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:21,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:21,063 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:21,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:21,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:21,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:21,104 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:21,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:21,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:21,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:21,145 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:21,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:21,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:21,186 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:21,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:21,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:21,218 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:77, output treesize:35 [2021-05-03 14:36:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:21,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:21,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-05-03 14:36:21,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368901873] [2021-05-03 14:36:21,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:36:21,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:21,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:36:21,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:21,363 INFO L87 Difference]: Start difference. First operand 148 states and 323 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:21,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:21,947 INFO L93 Difference]: Finished difference Result 183 states and 385 transitions. [2021-05-03 14:36:21,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:36:21,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:21,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:21,948 INFO L225 Difference]: With dead ends: 183 [2021-05-03 14:36:21,948 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:36:21,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 836.8ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:36:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:36:21,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 150. [2021-05-03 14:36:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.208053691275168) internal successors, (329), 149 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:21,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 329 transitions. [2021-05-03 14:36:21,950 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 329 transitions. Word has length 18 [2021-05-03 14:36:21,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:21,950 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 329 transitions. [2021-05-03 14:36:21,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:21,950 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 329 transitions. [2021-05-03 14:36:21,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:21,950 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:21,950 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:22,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1363 [2021-05-03 14:36:22,150 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:22,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:22,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1056713770, now seen corresponding path program 271 times [2021-05-03 14:36:22,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:22,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113278964] [2021-05-03 14:36:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113278964] [2021-05-03 14:36:22,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627423439] [2021-05-03 14:36:22,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:22,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:22,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:22,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:22,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:22,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:22,712 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:22,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:22,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:22,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:22,809 INFO L628 ElimStorePlain]: treesize reduction 98, result has 39.9 percent of original size [2021-05-03 14:36:22,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:22,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:22,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:22,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:22,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:22,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:22,852 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:22,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:22,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_227 vanished before elimination [2021-05-03 14:36:22,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:22,886 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:173, output treesize:36 [2021-05-03 14:36:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:23,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:23,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:36:23,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50208734] [2021-05-03 14:36:23,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:23,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:23,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:23,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:23,017 INFO L87 Difference]: Start difference. First operand 150 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:23,518 INFO L93 Difference]: Finished difference Result 186 states and 398 transitions. [2021-05-03 14:36:23,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:36:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:23,519 INFO L225 Difference]: With dead ends: 186 [2021-05-03 14:36:23,519 INFO L226 Difference]: Without dead ends: 174 [2021-05-03 14:36:23,519 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 676.5ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:36:23,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-03 14:36:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 150. [2021-05-03 14:36:23,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.208053691275168) internal successors, (329), 149 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:23,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 329 transitions. [2021-05-03 14:36:23,521 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 329 transitions. Word has length 18 [2021-05-03 14:36:23,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:23,521 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 329 transitions. [2021-05-03 14:36:23,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:23,521 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 329 transitions. [2021-05-03 14:36:23,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:23,521 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:23,521 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:23,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1370,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:23,722 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:23,722 INFO L82 PathProgramCache]: Analyzing trace with hash -508619346, now seen corresponding path program 272 times [2021-05-03 14:36:23,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:23,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993120196] [2021-05-03 14:36:23,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:23,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993120196] [2021-05-03 14:36:23,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335619902] [2021-05-03 14:36:23,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:23,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:23,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:23,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-03 14:36:23,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:24,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:24,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:36:24,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:24,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:24,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:24,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:24,149 INFO L550 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:24,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:24,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:36:24,160 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:38, output treesize:13 [2021-05-03 14:36:24,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:24,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:24,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:36:24,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493708771] [2021-05-03 14:36:24,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:24,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:24,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:24,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:24,218 INFO L87 Difference]: Start difference. First operand 150 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:24,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:24,940 INFO L93 Difference]: Finished difference Result 180 states and 385 transitions. [2021-05-03 14:36:24,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:36:24,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:24,941 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:36:24,941 INFO L226 Difference]: Without dead ends: 173 [2021-05-03 14:36:24,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 633.3ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:36:24,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-03 14:36:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 151. [2021-05-03 14:36:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2133333333333334) internal successors, (332), 150 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 332 transitions. [2021-05-03 14:36:24,943 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 332 transitions. Word has length 18 [2021-05-03 14:36:24,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:24,943 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 332 transitions. [2021-05-03 14:36:24,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:24,943 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 332 transitions. [2021-05-03 14:36:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:24,943 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:24,944 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:25,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-05-03 14:36:25,144 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:25,144 INFO L82 PathProgramCache]: Analyzing trace with hash 627565926, now seen corresponding path program 273 times [2021-05-03 14:36:25,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:25,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530081635] [2021-05-03 14:36:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:25,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530081635] [2021-05-03 14:36:25,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435974668] [2021-05-03 14:36:25,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:25,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:36:25,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:25,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:25,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:25,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:25,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:25,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:25,624 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:25,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:25,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:25,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:25,639 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:25,758 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 14:36:25,759 INFO L628 ElimStorePlain]: treesize reduction 80, result has 46.7 percent of original size [2021-05-03 14:36:25,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:25,767 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:25,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:25,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:25,775 INFO L550 ElimStorePlain]: Start of recursive call 7: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:25,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:25,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:25,824 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:25,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:25,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-05-03 14:36:25,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272940576] [2021-05-03 14:36:25,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:36:25,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:25,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:36:25,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:25,975 INFO L87 Difference]: Start difference. First operand 151 states and 332 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:26,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:26,870 INFO L93 Difference]: Finished difference Result 209 states and 429 transitions. [2021-05-03 14:36:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:36:26,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:26,871 INFO L225 Difference]: With dead ends: 209 [2021-05-03 14:36:26,871 INFO L226 Difference]: Without dead ends: 190 [2021-05-03 14:36:26,871 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 957.4ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:36:26,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-03 14:36:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 151. [2021-05-03 14:36:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2133333333333334) internal successors, (332), 150 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 332 transitions. [2021-05-03 14:36:26,873 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 332 transitions. Word has length 18 [2021-05-03 14:36:26,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:26,873 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 332 transitions. [2021-05-03 14:36:26,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 332 transitions. [2021-05-03 14:36:26,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:26,874 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:26,874 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:27,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-05-03 14:36:27,089 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:27,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1518604834, now seen corresponding path program 274 times [2021-05-03 14:36:27,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:27,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695248196] [2021-05-03 14:36:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:27,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695248196] [2021-05-03 14:36:27,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296402461] [2021-05-03 14:36:27,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:27,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:36:27,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:27,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:27,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:27,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:27,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:27,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:27,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:27,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:27,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:27,693 INFO L628 ElimStorePlain]: treesize reduction 85, result has 46.9 percent of original size [2021-05-03 14:36:27,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:27,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:27,698 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:27,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:27,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:27,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:27,760 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:27,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:27,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:27,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:27,820 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:27,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:27,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:27,864 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:28,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:28,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:36:28,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330303233] [2021-05-03 14:36:28,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:28,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:28,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:28,009 INFO L87 Difference]: Start difference. First operand 151 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:29,073 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 14:36:29,256 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:36:29,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:29,292 INFO L93 Difference]: Finished difference Result 240 states and 490 transitions. [2021-05-03 14:36:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:36:29,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:29,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:29,293 INFO L225 Difference]: With dead ends: 240 [2021-05-03 14:36:29,293 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 14:36:29,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1399.2ms TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:36:29,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 14:36:29,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 151. [2021-05-03 14:36:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2133333333333334) internal successors, (332), 150 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 332 transitions. [2021-05-03 14:36:29,295 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 332 transitions. Word has length 18 [2021-05-03 14:36:29,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:29,295 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 332 transitions. [2021-05-03 14:36:29,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:29,295 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 332 transitions. [2021-05-03 14:36:29,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:29,295 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:29,296 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:29,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1379,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:29,496 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash 669578342, now seen corresponding path program 275 times [2021-05-03 14:36:29,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:29,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603443644] [2021-05-03 14:36:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:29,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:29,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603443644] [2021-05-03 14:36:29,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168687189] [2021-05-03 14:36:29,828 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:29,849 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:36:29,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:29,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:30,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:30,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:30,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:30,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:30,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:30,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:30,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:30,184 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:36:30,184 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-05-03 14:36:30,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:30,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:30,191 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:30,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:30,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:30,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:30,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:30,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:30,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:30,279 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:30,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:30,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:30,317 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:30,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:30,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:36:30,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724828378] [2021-05-03 14:36:30,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:30,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:30,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:30,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:30,441 INFO L87 Difference]: Start difference. First operand 151 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:31,118 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2021-05-03 14:36:31,501 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 50 [2021-05-03 14:36:31,781 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2021-05-03 14:36:31,947 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-05-03 14:36:31,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:31,973 INFO L93 Difference]: Finished difference Result 262 states and 520 transitions. [2021-05-03 14:36:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:36:31,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:31,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:31,975 INFO L225 Difference]: With dead ends: 262 [2021-05-03 14:36:31,975 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 14:36:31,975 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1675.9ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:36:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 14:36:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 148. [2021-05-03 14:36:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.204081632653061) internal successors, (324), 147 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 324 transitions. [2021-05-03 14:36:31,976 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 324 transitions. Word has length 18 [2021-05-03 14:36:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:31,976 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 324 transitions. [2021-05-03 14:36:31,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 324 transitions. [2021-05-03 14:36:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:31,977 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:31,977 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:32,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:32,177 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:32,177 INFO L82 PathProgramCache]: Analyzing trace with hash -216219938, now seen corresponding path program 276 times [2021-05-03 14:36:32,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:32,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274666371] [2021-05-03 14:36:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:32,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274666371] [2021-05-03 14:36:32,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375679385] [2021-05-03 14:36:32,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:32,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:36:32,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:32,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:32,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:32,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:32,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:32,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:32,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:32,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:32,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:32,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:32,869 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:36:32,870 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-05-03 14:36:32,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:32,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:32,876 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:32,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:32,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:32,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:32,922 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:32,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:32,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:32,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:32,966 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:33,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:33,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:33,003 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:33,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:33,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:33,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-05-03 14:36:33,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255028393] [2021-05-03 14:36:33,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:36:33,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:33,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:36:33,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:33,127 INFO L87 Difference]: Start difference. First operand 148 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:33,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:33,548 INFO L93 Difference]: Finished difference Result 186 states and 396 transitions. [2021-05-03 14:36:33,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:36:33,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:33,550 INFO L225 Difference]: With dead ends: 186 [2021-05-03 14:36:33,550 INFO L226 Difference]: Without dead ends: 174 [2021-05-03 14:36:33,550 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 626.7ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:33,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-03 14:36:33,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 148. [2021-05-03 14:36:33,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.204081632653061) internal successors, (324), 147 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 324 transitions. [2021-05-03 14:36:33,551 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 324 transitions. Word has length 18 [2021-05-03 14:36:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:33,552 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 324 transitions. [2021-05-03 14:36:33,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 324 transitions. [2021-05-03 14:36:33,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:36:33,552 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:33,552 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:33,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1389 [2021-05-03 14:36:33,752 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:33,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:33,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1543833002, now seen corresponding path program 277 times [2021-05-03 14:36:33,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:33,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495267276] [2021-05-03 14:36:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:34,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495267276] [2021-05-03 14:36:34,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138629087] [2021-05-03 14:36:34,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:34,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:36:34,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:34,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:34,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:34,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:34,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:34,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:34,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:34,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:34,617 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:36:34,618 INFO L628 ElimStorePlain]: treesize reduction 88, result has 46.0 percent of original size [2021-05-03 14:36:34,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:34,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:36:34,622 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:34,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:34,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:34,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:34,663 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:34,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:34,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:34,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:36:34,703 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:34,735 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:34,736 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:34,736 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:173, output treesize:38 [2021-05-03 14:36:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:34,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:34,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-05-03 14:36:34,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607563249] [2021-05-03 14:36:34,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:36:34,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:34,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:36:34,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:34,867 INFO L87 Difference]: Start difference. First operand 148 states and 324 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:35,944 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2021-05-03 14:36:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:35,945 INFO L93 Difference]: Finished difference Result 237 states and 486 transitions. [2021-05-03 14:36:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:36:35,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:36:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:35,946 INFO L225 Difference]: With dead ends: 237 [2021-05-03 14:36:35,946 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 14:36:35,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1343.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:36:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 14:36:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 151. [2021-05-03 14:36:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-05-03 14:36:35,948 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 18 [2021-05-03 14:36:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:35,948 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-05-03 14:36:35,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:35,948 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-05-03 14:36:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:35,948 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:35,948 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:36,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1394,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:36,149 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash 444669190, now seen corresponding path program 278 times [2021-05-03 14:36:36,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:36,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815613766] [2021-05-03 14:36:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:36,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815613766] [2021-05-03 14:36:36,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407858067] [2021-05-03 14:36:36,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:36,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:36,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:36,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:36,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:36,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-05-03 14:36:36,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:36,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-05-03 14:36:36,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:36,482 INFO L628 ElimStorePlain]: treesize reduction 22, result has 29.0 percent of original size [2021-05-03 14:36:36,482 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:36:36,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:36:36,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:65, output treesize:9 [2021-05-03 14:36:36,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:36,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:36,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 14:36:36,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310337133] [2021-05-03 14:36:36,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:36:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:36,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:36:36,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:36:36,511 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:36,739 INFO L93 Difference]: Finished difference Result 198 states and 417 transitions. [2021-05-03 14:36:36,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:36:36,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:36,740 INFO L225 Difference]: With dead ends: 198 [2021-05-03 14:36:36,740 INFO L226 Difference]: Without dead ends: 198 [2021-05-03 14:36:36,740 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:36,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-03 14:36:36,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 155. [2021-05-03 14:36:36,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1948051948051948) internal successors, (338), 154 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 338 transitions. [2021-05-03 14:36:36,742 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 338 transitions. Word has length 19 [2021-05-03 14:36:36,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:36,742 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 338 transitions. [2021-05-03 14:36:36,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:36,742 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 338 transitions. [2021-05-03 14:36:36,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:36,742 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:36,742 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:36,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1399,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:36,943 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:36,943 INFO L82 PathProgramCache]: Analyzing trace with hash -520230954, now seen corresponding path program 279 times [2021-05-03 14:36:36,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:36,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025809109] [2021-05-03 14:36:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:37,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:37,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025809109] [2021-05-03 14:36:37,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778905170] [2021-05-03 14:36:37,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:37,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:36:37,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:37,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:36:37,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:37,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:37,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:36:37,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549138081] [2021-05-03 14:36:37,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:36:37,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:37,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:36:37,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:37,392 INFO L87 Difference]: Start difference. First operand 155 states and 338 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:37,794 INFO L93 Difference]: Finished difference Result 218 states and 457 transitions. [2021-05-03 14:36:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:36:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:37,795 INFO L225 Difference]: With dead ends: 218 [2021-05-03 14:36:37,795 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 14:36:37,796 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 416.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:36:37,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 14:36:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 155. [2021-05-03 14:36:37,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1948051948051948) internal successors, (338), 154 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 338 transitions. [2021-05-03 14:36:37,797 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 338 transitions. Word has length 19 [2021-05-03 14:36:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:37,797 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 338 transitions. [2021-05-03 14:36:37,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 338 transitions. [2021-05-03 14:36:37,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:37,798 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:37,798 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:37,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1401,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:37,998 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:37,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash -453676026, now seen corresponding path program 280 times [2021-05-03 14:36:37,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:37,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453720897] [2021-05-03 14:36:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:38,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453720897] [2021-05-03 14:36:38,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565776637] [2021-05-03 14:36:38,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:38,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:36:38,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:38,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:38,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:38,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:38,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:38,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:38,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:38,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:38,442 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:38,468 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-05-03 14:36:38,468 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:36:38,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:36:38,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:36:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:38,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:38,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:38,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978964180] [2021-05-03 14:36:38,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:38,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:38,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:38,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:38,500 INFO L87 Difference]: Start difference. First operand 155 states and 338 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:38,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:38,914 INFO L93 Difference]: Finished difference Result 214 states and 449 transitions. [2021-05-03 14:36:38,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:36:38,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:38,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:38,915 INFO L225 Difference]: With dead ends: 214 [2021-05-03 14:36:38,915 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 14:36:38,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:36:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 14:36:38,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 155. [2021-05-03 14:36:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1948051948051948) internal successors, (338), 154 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 338 transitions. [2021-05-03 14:36:38,917 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 338 transitions. Word has length 19 [2021-05-03 14:36:38,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:38,917 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 338 transitions. [2021-05-03 14:36:38,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:38,917 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 338 transitions. [2021-05-03 14:36:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:38,918 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:38,918 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:39,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1405 [2021-05-03 14:36:39,118 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:39,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:39,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1698455082, now seen corresponding path program 281 times [2021-05-03 14:36:39,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:39,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628507609] [2021-05-03 14:36:39,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:39,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:39,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628507609] [2021-05-03 14:36:39,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038382990] [2021-05-03 14:36:39,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:39,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:36:39,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:39,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:39,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:39,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:39,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:39,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:39,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:39,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:39,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:39,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:39,615 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-05-03 14:36:39,616 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:36:39,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:36:39,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:36:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:39,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:39,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:39,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714741214] [2021-05-03 14:36:39,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:39,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:39,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:39,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:39,648 INFO L87 Difference]: Start difference. First operand 155 states and 338 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:40,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:40,104 INFO L93 Difference]: Finished difference Result 210 states and 441 transitions. [2021-05-03 14:36:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:36:40,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:40,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:40,106 INFO L225 Difference]: With dead ends: 210 [2021-05-03 14:36:40,106 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 14:36:40,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:36:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 14:36:40,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 155. [2021-05-03 14:36:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1948051948051948) internal successors, (338), 154 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:40,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 338 transitions. [2021-05-03 14:36:40,107 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 338 transitions. Word has length 19 [2021-05-03 14:36:40,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:40,108 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 338 transitions. [2021-05-03 14:36:40,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:40,108 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 338 transitions. [2021-05-03 14:36:40,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:40,108 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:40,108 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:40,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:40,308 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1810458194, now seen corresponding path program 282 times [2021-05-03 14:36:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:40,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746833684] [2021-05-03 14:36:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:40,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746833684] [2021-05-03 14:36:40,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711470407] [2021-05-03 14:36:40,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:40,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:36:40,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:40,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:40,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:40,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:40,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:40,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:36:40,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:40,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:40,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:40,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:40,895 INFO L628 ElimStorePlain]: treesize reduction 74, result has 41.7 percent of original size [2021-05-03 14:36:40,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:40,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:36:40,902 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:40,931 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:40,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:36:40,935 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:40,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:40,962 INFO L518 ElimStorePlain]: Eliminatee v_prenex_246 vanished before elimination [2021-05-03 14:36:40,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:40,963 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:36:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:41,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:41,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:36:41,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936640977] [2021-05-03 14:36:41,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:36:41,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:41,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:36:41,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:41,023 INFO L87 Difference]: Start difference. First operand 155 states and 338 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:41,551 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-05-03 14:36:41,732 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-05-03 14:36:41,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:41,783 INFO L93 Difference]: Finished difference Result 205 states and 422 transitions. [2021-05-03 14:36:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:36:41,784 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:41,784 INFO L225 Difference]: With dead ends: 205 [2021-05-03 14:36:41,784 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 14:36:41,784 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 868.7ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:36:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 14:36:41,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 160. [2021-05-03 14:36:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1949685534591197) internal successors, (349), 159 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 349 transitions. [2021-05-03 14:36:41,785 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 349 transitions. Word has length 19 [2021-05-03 14:36:41,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:41,786 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 349 transitions. [2021-05-03 14:36:41,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:41,786 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 349 transitions. [2021-05-03 14:36:41,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:41,786 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:41,786 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:41,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1409,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:41,986 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:41,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1586526726, now seen corresponding path program 283 times [2021-05-03 14:36:41,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:41,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848308726] [2021-05-03 14:36:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:42,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848308726] [2021-05-03 14:36:42,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099703473] [2021-05-03 14:36:42,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:42,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:42,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:42,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:42,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:42,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:36:42,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:42,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:42,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:36:42,399 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:42,480 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-05-03 14:36:42,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:42,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:36:42,486 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:42,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:42,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:36:42,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:42,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:42,547 INFO L518 ElimStorePlain]: Eliminatee v_prenex_249 vanished before elimination [2021-05-03 14:36:42,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:42,549 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:36:42,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:42,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:42,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:42,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657450724] [2021-05-03 14:36:42,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:42,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:42,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:42,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:42,625 INFO L87 Difference]: Start difference. First operand 160 states and 349 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:43,155 INFO L93 Difference]: Finished difference Result 211 states and 444 transitions. [2021-05-03 14:36:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:36:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:43,157 INFO L225 Difference]: With dead ends: 211 [2021-05-03 14:36:43,157 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 14:36:43,157 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:36:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 14:36:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 160. [2021-05-03 14:36:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1949685534591197) internal successors, (349), 159 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 349 transitions. [2021-05-03 14:36:43,159 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 349 transitions. Word has length 19 [2021-05-03 14:36:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:43,159 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 349 transitions. [2021-05-03 14:36:43,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:43,159 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 349 transitions. [2021-05-03 14:36:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:43,159 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:43,159 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:43,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1416,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:43,359 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:43,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1348323830, now seen corresponding path program 284 times [2021-05-03 14:36:43,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:43,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145573705] [2021-05-03 14:36:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:43,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145573705] [2021-05-03 14:36:43,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096893626] [2021-05-03 14:36:43,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:43,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:43,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:43,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:43,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:43,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:43,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:43,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:43,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:43,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:43,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:36:43,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:43,957 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-05-03 14:36:43,958 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:36:43,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:43,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:43,963 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:43,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:43,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:43,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:36:43,998 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:44,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:44,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:44,027 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:36:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:44,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:44,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:44,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289735931] [2021-05-03 14:36:44,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:44,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:44,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:44,110 INFO L87 Difference]: Start difference. First operand 160 states and 349 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:44,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:44,432 INFO L93 Difference]: Finished difference Result 190 states and 401 transitions. [2021-05-03 14:36:44,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:36:44,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:44,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:44,433 INFO L225 Difference]: With dead ends: 190 [2021-05-03 14:36:44,433 INFO L226 Difference]: Without dead ends: 190 [2021-05-03 14:36:44,434 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 520.5ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-03 14:36:44,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 156. [2021-05-03 14:36:44,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.193548387096774) internal successors, (340), 155 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 340 transitions. [2021-05-03 14:36:44,435 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 340 transitions. Word has length 19 [2021-05-03 14:36:44,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:44,435 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 340 transitions. [2021-05-03 14:36:44,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 340 transitions. [2021-05-03 14:36:44,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:44,435 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:44,435 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:44,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1420 [2021-05-03 14:36:44,636 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:44,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:44,636 INFO L82 PathProgramCache]: Analyzing trace with hash -944542190, now seen corresponding path program 285 times [2021-05-03 14:36:44,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:44,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213688471] [2021-05-03 14:36:44,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:44,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:44,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213688471] [2021-05-03 14:36:44,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479147487] [2021-05-03 14:36:44,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:44,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:36:44,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:44,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:36:44,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:45,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:45,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:45,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159674920] [2021-05-03 14:36:45,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:45,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:45,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:45,027 INFO L87 Difference]: Start difference. First operand 156 states and 340 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:45,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:45,255 INFO L93 Difference]: Finished difference Result 180 states and 386 transitions. [2021-05-03 14:36:45,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:36:45,256 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:45,256 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:36:45,256 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:36:45,256 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:45,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:36:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 157. [2021-05-03 14:36:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1923076923076925) internal successors, (342), 156 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:45,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 342 transitions. [2021-05-03 14:36:45,258 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 342 transitions. Word has length 19 [2021-05-03 14:36:45,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:45,258 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 342 transitions. [2021-05-03 14:36:45,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:45,258 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 342 transitions. [2021-05-03 14:36:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:45,258 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:45,258 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:45,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-05-03 14:36:45,459 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:45,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:45,459 INFO L82 PathProgramCache]: Analyzing trace with hash -428211314, now seen corresponding path program 286 times [2021-05-03 14:36:45,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:45,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857491470] [2021-05-03 14:36:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:45,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857491470] [2021-05-03 14:36:45,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016851277] [2021-05-03 14:36:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:45,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:36:45,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:36:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:45,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:45,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:36:45,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520055586] [2021-05-03 14:36:45,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:36:45,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:45,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:36:45,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:45,873 INFO L87 Difference]: Start difference. First operand 157 states and 342 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:46,262 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-03 14:36:46,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:46,444 INFO L93 Difference]: Finished difference Result 174 states and 369 transitions. [2021-05-03 14:36:46,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:36:46,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:46,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:46,446 INFO L225 Difference]: With dead ends: 174 [2021-05-03 14:36:46,446 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:36:46,446 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 595.8ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:36:46,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:36:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 157. [2021-05-03 14:36:46,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1923076923076925) internal successors, (342), 156 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:46,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 342 transitions. [2021-05-03 14:36:46,448 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 342 transitions. Word has length 19 [2021-05-03 14:36:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:46,448 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 342 transitions. [2021-05-03 14:36:46,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:46,448 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 342 transitions. [2021-05-03 14:36:46,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:46,448 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:46,448 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:46,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1430 [2021-05-03 14:36:46,653 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:46,653 INFO L82 PathProgramCache]: Analyzing trace with hash -877987262, now seen corresponding path program 287 times [2021-05-03 14:36:46,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:46,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112525170] [2021-05-03 14:36:46,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:46,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112525170] [2021-05-03 14:36:46,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468522607] [2021-05-03 14:36:46,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:46,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:36:46,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:46,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:36:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:47,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:47,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:36:47,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842264080] [2021-05-03 14:36:47,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:36:47,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:36:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:47,089 INFO L87 Difference]: Start difference. First operand 157 states and 342 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:47,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:47,448 INFO L93 Difference]: Finished difference Result 197 states and 420 transitions. [2021-05-03 14:36:47,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:36:47,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:47,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:47,449 INFO L225 Difference]: With dead ends: 197 [2021-05-03 14:36:47,449 INFO L226 Difference]: Without dead ends: 197 [2021-05-03 14:36:47,450 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-03 14:36:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 158. [2021-05-03 14:36:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1910828025477707) internal successors, (344), 157 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 344 transitions. [2021-05-03 14:36:47,452 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 344 transitions. Word has length 19 [2021-05-03 14:36:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:47,452 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 344 transitions. [2021-05-03 14:36:47,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 344 transitions. [2021-05-03 14:36:47,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:47,453 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:47,453 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:47,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1435 [2021-05-03 14:36:47,653 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2122766318, now seen corresponding path program 288 times [2021-05-03 14:36:47,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:47,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973160743] [2021-05-03 14:36:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:47,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973160743] [2021-05-03 14:36:47,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3942846] [2021-05-03 14:36:47,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:47,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:36:47,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:47,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:36:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:48,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:48,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:36:48,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918982440] [2021-05-03 14:36:48,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:36:48,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:48,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:36:48,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:48,142 INFO L87 Difference]: Start difference. First operand 158 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:48,484 INFO L93 Difference]: Finished difference Result 194 states and 414 transitions. [2021-05-03 14:36:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:36:48,485 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:48,485 INFO L225 Difference]: With dead ends: 194 [2021-05-03 14:36:48,485 INFO L226 Difference]: Without dead ends: 194 [2021-05-03 14:36:48,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-03 14:36:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 159. [2021-05-03 14:36:48,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.189873417721519) internal successors, (346), 158 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:48,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 346 transitions. [2021-05-03 14:36:48,487 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 346 transitions. Word has length 19 [2021-05-03 14:36:48,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:48,487 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 346 transitions. [2021-05-03 14:36:48,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:48,487 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 346 transitions. [2021-05-03 14:36:48,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:48,487 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:48,487 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:48,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1439,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:48,688 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1812284460, now seen corresponding path program 289 times [2021-05-03 14:36:48,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:48,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459022136] [2021-05-03 14:36:48,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:48,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459022136] [2021-05-03 14:36:48,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080055812] [2021-05-03 14:36:48,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:48,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:48,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:48,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:49,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:49,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:49,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:49,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:49,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:49,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:49,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:49,174 INFO L628 ElimStorePlain]: treesize reduction 76, result has 36.1 percent of original size [2021-05-03 14:36:49,175 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:36:49,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:36:49,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:49,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:49,208 INFO L518 ElimStorePlain]: Eliminatee v_prenex_258 vanished before elimination [2021-05-03 14:36:49,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:49,210 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:36:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:49,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:49,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:49,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448429372] [2021-05-03 14:36:49,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:49,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:49,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:49,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:49,287 INFO L87 Difference]: Start difference. First operand 159 states and 346 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:49,596 INFO L93 Difference]: Finished difference Result 195 states and 416 transitions. [2021-05-03 14:36:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:36:49,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:49,597 INFO L225 Difference]: With dead ends: 195 [2021-05-03 14:36:49,597 INFO L226 Difference]: Without dead ends: 195 [2021-05-03 14:36:49,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 325.1ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:49,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-03 14:36:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 160. [2021-05-03 14:36:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.188679245283019) internal successors, (348), 159 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 348 transitions. [2021-05-03 14:36:49,599 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 348 transitions. Word has length 19 [2021-05-03 14:36:49,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:49,599 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 348 transitions. [2021-05-03 14:36:49,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:49,599 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 348 transitions. [2021-05-03 14:36:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:49,599 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:49,599 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:49,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1443 [2021-05-03 14:36:49,800 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:49,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1772635066, now seen corresponding path program 290 times [2021-05-03 14:36:49,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:49,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508681112] [2021-05-03 14:36:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:50,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:50,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508681112] [2021-05-03 14:36:50,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027065496] [2021-05-03 14:36:50,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:50,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:50,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:50,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:50,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:50,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:50,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:50,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:36:50,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:50,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:50,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:50,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:50,376 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-05-03 14:36:50,377 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:36:50,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:50,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:50,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:50,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:50,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:50,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:36:50,418 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:50,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:50,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:50,450 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:36:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:50,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:50,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:50,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252861696] [2021-05-03 14:36:50,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:50,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:50,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:50,530 INFO L87 Difference]: Start difference. First operand 160 states and 348 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:50,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:50,767 INFO L93 Difference]: Finished difference Result 170 states and 366 transitions. [2021-05-03 14:36:50,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:36:50,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:50,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:50,769 INFO L225 Difference]: With dead ends: 170 [2021-05-03 14:36:50,769 INFO L226 Difference]: Without dead ends: 170 [2021-05-03 14:36:50,769 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 408.1ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-03 14:36:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 156. [2021-05-03 14:36:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.193548387096774) internal successors, (340), 155 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 340 transitions. [2021-05-03 14:36:50,770 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 340 transitions. Word has length 19 [2021-05-03 14:36:50,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:50,770 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 340 transitions. [2021-05-03 14:36:50,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:50,771 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 340 transitions. [2021-05-03 14:36:50,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:50,771 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:50,771 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:50,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1447,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:50,971 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:50,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1727037130, now seen corresponding path program 291 times [2021-05-03 14:36:50,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:50,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114159563] [2021-05-03 14:36:50,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:51,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:51,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114159563] [2021-05-03 14:36:51,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77444757] [2021-05-03 14:36:51,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:51,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:36:51,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:51,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:36:51,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:51,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:51,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:36:51,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297526017] [2021-05-03 14:36:51,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:36:51,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:51,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:36:51,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:51,331 INFO L87 Difference]: Start difference. First operand 156 states and 340 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:51,698 INFO L93 Difference]: Finished difference Result 191 states and 408 transitions. [2021-05-03 14:36:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:36:51,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:51,700 INFO L225 Difference]: With dead ends: 191 [2021-05-03 14:36:51,700 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:36:51,700 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:36:51,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:36:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 158. [2021-05-03 14:36:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1910828025477707) internal successors, (344), 157 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:51,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 344 transitions. [2021-05-03 14:36:51,701 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 344 transitions. Word has length 19 [2021-05-03 14:36:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:51,701 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 344 transitions. [2021-05-03 14:36:51,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 344 transitions. [2021-05-03 14:36:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:51,702 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:51,702 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:51,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1453 [2021-05-03 14:36:51,902 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:51,903 INFO L82 PathProgramCache]: Analyzing trace with hash 482258074, now seen corresponding path program 292 times [2021-05-03 14:36:51,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:51,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534807596] [2021-05-03 14:36:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:52,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534807596] [2021-05-03 14:36:52,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454340552] [2021-05-03 14:36:52,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:52,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:36:52,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:52,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:52,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:52,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:52,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:52,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:52,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:52,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:52,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:52,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:52,363 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-05-03 14:36:52,363 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:36:52,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:36:52,365 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:36:52,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:52,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:52,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:52,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772716208] [2021-05-03 14:36:52,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:52,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:52,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:52,398 INFO L87 Difference]: Start difference. First operand 158 states and 344 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:53,243 INFO L93 Difference]: Finished difference Result 210 states and 446 transitions. [2021-05-03 14:36:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:36:53,244 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:53,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:53,244 INFO L225 Difference]: With dead ends: 210 [2021-05-03 14:36:53,244 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 14:36:53,244 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 664.9ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:36:53,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 14:36:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 159. [2021-05-03 14:36:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.189873417721519) internal successors, (346), 158 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:53,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 346 transitions. [2021-05-03 14:36:53,246 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 346 transitions. Word has length 19 [2021-05-03 14:36:53,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:53,246 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 346 transitions. [2021-05-03 14:36:53,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:53,246 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 346 transitions. [2021-05-03 14:36:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:53,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:53,246 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:53,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1457,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:53,449 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash 122341556, now seen corresponding path program 293 times [2021-05-03 14:36:53,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:53,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628026800] [2021-05-03 14:36:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:53,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628026800] [2021-05-03 14:36:53,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401412212] [2021-05-03 14:36:53,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:53,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:36:53,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:36:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:53,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:53,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:36:53,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429298743] [2021-05-03 14:36:53,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:36:53,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:53,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:36:53,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:53,880 INFO L87 Difference]: Start difference. First operand 159 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:54,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:54,757 INFO L93 Difference]: Finished difference Result 207 states and 441 transitions. [2021-05-03 14:36:54,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:36:54,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:54,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:54,758 INFO L225 Difference]: With dead ends: 207 [2021-05-03 14:36:54,758 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 14:36:54,759 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 655.5ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:36:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 14:36:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 160. [2021-05-03 14:36:54,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.188679245283019) internal successors, (348), 159 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:54,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 348 transitions. [2021-05-03 14:36:54,760 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 348 transitions. Word has length 19 [2021-05-03 14:36:54,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:54,760 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 348 transitions. [2021-05-03 14:36:54,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:54,761 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 348 transitions. [2021-05-03 14:36:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:54,761 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:54,761 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:54,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1459 [2021-05-03 14:36:54,962 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash 832389326, now seen corresponding path program 294 times [2021-05-03 14:36:54,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:54,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315400847] [2021-05-03 14:36:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:55,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:55,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315400847] [2021-05-03 14:36:55,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312673998] [2021-05-03 14:36:55,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:55,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:36:55,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:55,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:55,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:55,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:55,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:36:55,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:55,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:55,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:55,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:55,485 INFO L628 ElimStorePlain]: treesize reduction 70, result has 44.9 percent of original size [2021-05-03 14:36:55,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:55,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:36:55,492 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:55,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:55,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:55,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:55,529 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:55,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:55,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:55,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:36:55,565 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:55,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:55,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:55,595 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:36:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:55,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:55,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:55,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306792428] [2021-05-03 14:36:55,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:55,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:55,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:55,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:55,675 INFO L87 Difference]: Start difference. First operand 160 states and 348 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:56,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:56,163 INFO L93 Difference]: Finished difference Result 178 states and 382 transitions. [2021-05-03 14:36:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:36:56,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:56,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:56,164 INFO L225 Difference]: With dead ends: 178 [2021-05-03 14:36:56,164 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 14:36:56,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 526.4ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:36:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 14:36:56,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 157. [2021-05-03 14:36:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1923076923076925) internal successors, (342), 156 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:56,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 342 transitions. [2021-05-03 14:36:56,167 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 342 transitions. Word has length 19 [2021-05-03 14:36:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:56,167 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 342 transitions. [2021-05-03 14:36:56,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 342 transitions. [2021-05-03 14:36:56,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:56,167 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:56,167 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:56,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1471,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:56,385 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash -403540206, now seen corresponding path program 295 times [2021-05-03 14:36:56,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:56,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603040629] [2021-05-03 14:36:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:56,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603040629] [2021-05-03 14:36:56,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806170570] [2021-05-03 14:36:56,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:56,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:36:56,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:56,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:56,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:36:56,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205711538] [2021-05-03 14:36:56,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:36:56,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:56,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:36:56,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:56,748 INFO L87 Difference]: Start difference. First operand 157 states and 342 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:57,327 INFO L93 Difference]: Finished difference Result 200 states and 427 transitions. [2021-05-03 14:36:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:36:57,328 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:57,328 INFO L225 Difference]: With dead ends: 200 [2021-05-03 14:36:57,328 INFO L226 Difference]: Without dead ends: 200 [2021-05-03 14:36:57,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 437.0ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:36:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-03 14:36:57,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 161. [2021-05-03 14:36:57,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:57,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:36:57,330 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:36:57,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:57,331 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:36:57,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:57,331 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:36:57,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:57,331 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:57,331 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:57,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1477 [2021-05-03 14:36:57,531 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:57,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:57,532 INFO L82 PathProgramCache]: Analyzing trace with hash -763456724, now seen corresponding path program 296 times [2021-05-03 14:36:57,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:57,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668895061] [2021-05-03 14:36:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:57,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668895061] [2021-05-03 14:36:57,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525811860] [2021-05-03 14:36:57,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:57,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:36:57,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:57,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:36:57,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:57,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:57,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:57,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:36:57,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:57,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:57,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:36:57,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:57,935 INFO L628 ElimStorePlain]: treesize reduction 74, result has 39.8 percent of original size [2021-05-03 14:36:57,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:57,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:36:57,942 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:36:57,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:57,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:36:57,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:58,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:58,009 INFO L518 ElimStorePlain]: Eliminatee v_prenex_268 vanished before elimination [2021-05-03 14:36:58,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:58,011 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:36:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:58,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:58,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:36:58,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558562963] [2021-05-03 14:36:58,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:36:58,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:58,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:36:58,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:36:58,090 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:58,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:36:58,999 INFO L93 Difference]: Finished difference Result 221 states and 468 transitions. [2021-05-03 14:36:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:36:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:36:59,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:36:59,000 INFO L225 Difference]: With dead ends: 221 [2021-05-03 14:36:59,001 INFO L226 Difference]: Without dead ends: 221 [2021-05-03 14:36:59,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 657.9ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:36:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-03 14:36:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2021-05-03 14:36:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.186335403726708) internal successors, (352), 161 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 352 transitions. [2021-05-03 14:36:59,003 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 352 transitions. Word has length 19 [2021-05-03 14:36:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:36:59,003 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 352 transitions. [2021-05-03 14:36:59,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:36:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 352 transitions. [2021-05-03 14:36:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:36:59,003 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:36:59,003 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:36:59,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1481 [2021-05-03 14:36:59,204 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:36:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:36:59,204 INFO L82 PathProgramCache]: Analyzing trace with hash -53408954, now seen corresponding path program 297 times [2021-05-03 14:36:59,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:36:59,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816951847] [2021-05-03 14:36:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:36:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:36:59,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:59,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816951847] [2021-05-03 14:36:59,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296159184] [2021-05-03 14:36:59,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:36:59,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:36:59,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:36:59,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:36:59,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:36:59,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:59,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:59,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:36:59,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:59,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:36:59,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:36:59,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:59,635 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:36:59,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:36:59,640 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:36:59,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:36:59,664 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:36:59,664 INFO L518 ElimStorePlain]: Eliminatee v_prenex_271 vanished before elimination [2021-05-03 14:36:59,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:36:59,665 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:36:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:36:59,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:36:59,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:36:59,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754898551] [2021-05-03 14:36:59,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:36:59,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:36:59,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:36:59,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:36:59,715 INFO L87 Difference]: Start difference. First operand 162 states and 352 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:00,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:00,493 INFO L93 Difference]: Finished difference Result 187 states and 400 transitions. [2021-05-03 14:37:00,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:37:00,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:00,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:00,494 INFO L225 Difference]: With dead ends: 187 [2021-05-03 14:37:00,494 INFO L226 Difference]: Without dead ends: 187 [2021-05-03 14:37:00,495 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 639.9ms TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:37:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-03 14:37:00,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 160. [2021-05-03 14:37:00,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.188679245283019) internal successors, (348), 159 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 348 transitions. [2021-05-03 14:37:00,496 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 348 transitions. Word has length 19 [2021-05-03 14:37:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:00,496 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 348 transitions. [2021-05-03 14:37:00,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:00,496 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 348 transitions. [2021-05-03 14:37:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:00,496 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:00,496 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:00,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1485 [2021-05-03 14:37:00,697 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:00,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:00,697 INFO L82 PathProgramCache]: Analyzing trace with hash 774657482, now seen corresponding path program 298 times [2021-05-03 14:37:00,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:00,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243027534] [2021-05-03 14:37:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:00,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243027534] [2021-05-03 14:37:00,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755195758] [2021-05-03 14:37:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:00,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:01,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:01,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:37:01,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98514069] [2021-05-03 14:37:01,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:37:01,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:37:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:37:01,088 INFO L87 Difference]: Start difference. First operand 160 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:01,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:01,733 INFO L93 Difference]: Finished difference Result 199 states and 416 transitions. [2021-05-03 14:37:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:37:01,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:01,734 INFO L225 Difference]: With dead ends: 199 [2021-05-03 14:37:01,734 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 14:37:01,734 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:37:01,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 14:37:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 162. [2021-05-03 14:37:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1925465838509317) internal successors, (353), 161 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 353 transitions. [2021-05-03 14:37:01,736 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 353 transitions. Word has length 19 [2021-05-03 14:37:01,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:01,736 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 353 transitions. [2021-05-03 14:37:01,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 353 transitions. [2021-05-03 14:37:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:01,736 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:01,736 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:01,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1492,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:01,937 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:01,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:01,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1510124104, now seen corresponding path program 299 times [2021-05-03 14:37:01,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:01,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175600885] [2021-05-03 14:37:01,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:02,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175600885] [2021-05-03 14:37:02,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627734893] [2021-05-03 14:37:02,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:02,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:37:02,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:02,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:02,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:02,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:02,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:02,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:02,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:02,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:02,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:02,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:02,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:02,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:02,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:02,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:02,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:02,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:02,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:37:02,261 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:02,315 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:37:02,315 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:02,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:02,316 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:37:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:02,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:02,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:37:02,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589403812] [2021-05-03 14:37:02,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:37:02,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:02,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:37:02,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:37:02,366 INFO L87 Difference]: Start difference. First operand 162 states and 353 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:03,105 INFO L93 Difference]: Finished difference Result 247 states and 511 transitions. [2021-05-03 14:37:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:37:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:03,106 INFO L225 Difference]: With dead ends: 247 [2021-05-03 14:37:03,106 INFO L226 Difference]: Without dead ends: 247 [2021-05-03 14:37:03,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 536.5ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:37:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-03 14:37:03,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 163. [2021-05-03 14:37:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2098765432098766) internal successors, (358), 162 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:03,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 358 transitions. [2021-05-03 14:37:03,108 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 358 transitions. Word has length 19 [2021-05-03 14:37:03,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:03,109 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 358 transitions. [2021-05-03 14:37:03,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 358 transitions. [2021-05-03 14:37:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:03,109 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:03,109 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:03,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-05-03 14:37:03,309 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash -98277772, now seen corresponding path program 300 times [2021-05-03 14:37:03,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:03,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069789059] [2021-05-03 14:37:03,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:03,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:03,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069789059] [2021-05-03 14:37:03,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643615734] [2021-05-03 14:37:03,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:37:03,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:37:03,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:03,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:03,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:03,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:03,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:37:03,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397230643] [2021-05-03 14:37:03,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:37:03,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:03,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:37:03,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:37:03,730 INFO L87 Difference]: Start difference. First operand 163 states and 358 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:04,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:04,254 INFO L93 Difference]: Finished difference Result 175 states and 376 transitions. [2021-05-03 14:37:04,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:37:04,255 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:04,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:04,255 INFO L225 Difference]: With dead ends: 175 [2021-05-03 14:37:04,255 INFO L226 Difference]: Without dead ends: 171 [2021-05-03 14:37:04,255 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:37:04,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-03 14:37:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 163. [2021-05-03 14:37:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2037037037037037) internal successors, (357), 162 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 357 transitions. [2021-05-03 14:37:04,257 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 357 transitions. Word has length 19 [2021-05-03 14:37:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:04,257 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 357 transitions. [2021-05-03 14:37:04,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 357 transitions. [2021-05-03 14:37:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:04,257 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:04,257 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:04,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1512,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:04,458 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:04,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:04,458 INFO L82 PathProgramCache]: Analyzing trace with hash -11396538, now seen corresponding path program 301 times [2021-05-03 14:37:04,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:04,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109362147] [2021-05-03 14:37:04,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:04,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109362147] [2021-05-03 14:37:04,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211108241] [2021-05-03 14:37:04,597 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:04,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:04,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:04,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:04,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:04,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:04,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:04,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:04,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:04,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:04,777 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:04,813 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:37:04,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:04,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:37:04,819 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:37:04,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:04,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:04,830 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:37:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:04,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:04,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:04,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35185337] [2021-05-03 14:37:04,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:04,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:04,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:04,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:04,866 INFO L87 Difference]: Start difference. First operand 163 states and 357 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:05,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:05,410 INFO L93 Difference]: Finished difference Result 204 states and 435 transitions. [2021-05-03 14:37:05,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:37:05,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:05,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:05,411 INFO L225 Difference]: With dead ends: 204 [2021-05-03 14:37:05,411 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 14:37:05,411 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:37:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 14:37:05,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 161. [2021-05-03 14:37:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:05,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:37:05,413 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:37:05,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:05,413 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:37:05,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:05,413 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:37:05,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:05,413 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:05,413 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:05,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1516,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:05,614 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:05,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:05,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1213288618, now seen corresponding path program 302 times [2021-05-03 14:37:05,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:05,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499726321] [2021-05-03 14:37:05,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:05,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499726321] [2021-05-03 14:37:05,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387255151] [2021-05-03 14:37:05,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:05,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:05,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:05,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:05,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:06,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:06,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:06,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:06,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:06,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:06,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:06,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:06,053 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-05-03 14:37:06,053 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:06,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:06,055 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:37:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:06,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:06,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:06,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908581135] [2021-05-03 14:37:06,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:06,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:06,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:06,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:06,095 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:06,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:06,408 INFO L93 Difference]: Finished difference Result 182 states and 391 transitions. [2021-05-03 14:37:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:37:06,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:06,409 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:37:06,409 INFO L226 Difference]: Without dead ends: 182 [2021-05-03 14:37:06,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 313.0ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:06,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-03 14:37:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 161. [2021-05-03 14:37:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:06,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:37:06,411 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:37:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:06,411 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:37:06,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:06,411 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:37:06,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:06,411 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:06,411 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:06,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1517,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:06,612 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:06,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:06,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1146733690, now seen corresponding path program 303 times [2021-05-03 14:37:06,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:06,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786775453] [2021-05-03 14:37:06,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786775453] [2021-05-03 14:37:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588174581] [2021-05-03 14:37:06,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:06,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:37:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:07,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:07,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:07,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790521473] [2021-05-03 14:37:07,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:07,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:07,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:07,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:07,040 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:07,797 INFO L93 Difference]: Finished difference Result 204 states and 435 transitions. [2021-05-03 14:37:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:07,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:07,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:07,799 INFO L225 Difference]: With dead ends: 204 [2021-05-03 14:37:07,799 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 14:37:07,799 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 704.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:37:07,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 14:37:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 162. [2021-05-03 14:37:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.186335403726708) internal successors, (352), 161 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 352 transitions. [2021-05-03 14:37:07,801 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 352 transitions. Word has length 19 [2021-05-03 14:37:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:07,801 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 352 transitions. [2021-05-03 14:37:07,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 352 transitions. [2021-05-03 14:37:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:07,801 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:07,801 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:08,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1519,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:08,002 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:08,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1903454550, now seen corresponding path program 304 times [2021-05-03 14:37:08,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:08,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234958246] [2021-05-03 14:37:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:08,154 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:08,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234958246] [2021-05-03 14:37:08,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151291039] [2021-05-03 14:37:08,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:08,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:08,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:08,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:08,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:08,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:08,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:08,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:08,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:08,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:08,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:08,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:08,512 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-05-03 14:37:08,513 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:08,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:08,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:37:08,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:08,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:08,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:08,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297101611] [2021-05-03 14:37:08,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:08,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:08,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:08,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:08,548 INFO L87 Difference]: Start difference. First operand 162 states and 352 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:09,366 INFO L93 Difference]: Finished difference Result 219 states and 465 transitions. [2021-05-03 14:37:09,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:37:09,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:09,368 INFO L225 Difference]: With dead ends: 219 [2021-05-03 14:37:09,368 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 14:37:09,368 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:37:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 14:37:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 163. [2021-05-03 14:37:09,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.185185185185185) internal successors, (354), 162 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 354 transitions. [2021-05-03 14:37:09,370 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 354 transitions. Word has length 19 [2021-05-03 14:37:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:09,370 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 354 transitions. [2021-05-03 14:37:09,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 354 transitions. [2021-05-03 14:37:09,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:09,370 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:09,370 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:09,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1523 [2021-05-03 14:37:09,570 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:09,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1543538032, now seen corresponding path program 305 times [2021-05-03 14:37:09,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:09,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787736593] [2021-05-03 14:37:09,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:09,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787736593] [2021-05-03 14:37:09,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844622665] [2021-05-03 14:37:09,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:09,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:37:09,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:09,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:10,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:10,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:10,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763559015] [2021-05-03 14:37:10,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:10,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:10,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:10,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:10,035 INFO L87 Difference]: Start difference. First operand 163 states and 354 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:10,840 INFO L93 Difference]: Finished difference Result 215 states and 458 transitions. [2021-05-03 14:37:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:37:10,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:10,842 INFO L225 Difference]: With dead ends: 215 [2021-05-03 14:37:10,842 INFO L226 Difference]: Without dead ends: 215 [2021-05-03 14:37:10,842 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 737.1ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:37:10,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-03 14:37:10,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2021-05-03 14:37:10,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.184049079754601) internal successors, (356), 163 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:10,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 356 transitions. [2021-05-03 14:37:10,844 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 356 transitions. Word has length 19 [2021-05-03 14:37:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:10,844 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 356 transitions. [2021-05-03 14:37:10,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 356 transitions. [2021-05-03 14:37:10,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:10,844 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:10,844 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:11,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1525,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:11,045 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash -2041381494, now seen corresponding path program 306 times [2021-05-03 14:37:11,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:11,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255905711] [2021-05-03 14:37:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:11,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255905711] [2021-05-03 14:37:11,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646722288] [2021-05-03 14:37:11,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:11,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:37:11,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:11,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:11,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:11,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:11,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:37:11,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:11,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:11,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:11,563 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:11,665 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-05-03 14:37:11,666 INFO L628 ElimStorePlain]: treesize reduction 70, result has 44.9 percent of original size [2021-05-03 14:37:11,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:11,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:37:11,673 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:37:11,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:11,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:11,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:11,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:11,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:11,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:11,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:37:11,749 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:37:11,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:11,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:11,780 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:37:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:11,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:11,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:11,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149449239] [2021-05-03 14:37:11,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:11,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:11,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:11,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:11,864 INFO L87 Difference]: Start difference. First operand 164 states and 356 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:12,263 INFO L93 Difference]: Finished difference Result 178 states and 383 transitions. [2021-05-03 14:37:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:37:12,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:12,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:12,264 INFO L225 Difference]: With dead ends: 178 [2021-05-03 14:37:12,264 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 14:37:12,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:12,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 14:37:12,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 159. [2021-05-03 14:37:12,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.189873417721519) internal successors, (346), 158 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:12,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 346 transitions. [2021-05-03 14:37:12,266 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 346 transitions. Word has length 19 [2021-05-03 14:37:12,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:12,266 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 346 transitions. [2021-05-03 14:37:12,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:12,266 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 346 transitions. [2021-05-03 14:37:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:12,266 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:12,266 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:12,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1537 [2021-05-03 14:37:12,467 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:12,467 INFO L82 PathProgramCache]: Analyzing trace with hash 609668230, now seen corresponding path program 307 times [2021-05-03 14:37:12,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:12,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457395889] [2021-05-03 14:37:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:12,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:12,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457395889] [2021-05-03 14:37:12,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503530941] [2021-05-03 14:37:12,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:12,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:12,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:12,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:12,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:12,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:12,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:12,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:12,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:12,884 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-05-03 14:37:12,884 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:12,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:12,887 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:37:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:12,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:12,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:12,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181937891] [2021-05-03 14:37:12,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:12,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:12,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:12,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:12,926 INFO L87 Difference]: Start difference. First operand 159 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:13,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:13,354 INFO L93 Difference]: Finished difference Result 208 states and 444 transitions. [2021-05-03 14:37:13,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:13,355 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:13,356 INFO L225 Difference]: With dead ends: 208 [2021-05-03 14:37:13,356 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 14:37:13,356 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:13,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 14:37:13,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-05-03 14:37:13,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.188679245283019) internal successors, (348), 159 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 348 transitions. [2021-05-03 14:37:13,357 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 348 transitions. Word has length 19 [2021-05-03 14:37:13,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:13,358 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 348 transitions. [2021-05-03 14:37:13,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:13,358 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 348 transitions. [2021-05-03 14:37:13,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:13,358 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:13,358 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:13,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1543 [2021-05-03 14:37:13,558 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:13,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:13,559 INFO L82 PathProgramCache]: Analyzing trace with hash -635110826, now seen corresponding path program 308 times [2021-05-03 14:37:13,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:13,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521666085] [2021-05-03 14:37:13,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:13,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521666085] [2021-05-03 14:37:13,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56063647] [2021-05-03 14:37:13,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:13,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:13,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:13,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:13,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:13,991 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:13,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:13,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:13,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:14,024 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-05-03 14:37:14,024 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:14,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:14,026 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:37:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:14,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:14,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:14,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792919379] [2021-05-03 14:37:14,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:14,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:14,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:14,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:14,058 INFO L87 Difference]: Start difference. First operand 160 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:14,823 INFO L93 Difference]: Finished difference Result 222 states and 471 transitions. [2021-05-03 14:37:14,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:37:14,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:14,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:14,824 INFO L225 Difference]: With dead ends: 222 [2021-05-03 14:37:14,824 INFO L226 Difference]: Without dead ends: 222 [2021-05-03 14:37:14,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 689.6ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:37:14,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-03 14:37:14,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 161. [2021-05-03 14:37:14,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:14,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:37:14,826 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:37:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:14,826 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:37:14,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:14,826 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:37:14,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:14,826 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:14,827 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:15,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1545 [2021-05-03 14:37:15,027 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash -995027344, now seen corresponding path program 309 times [2021-05-03 14:37:15,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:15,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004047557] [2021-05-03 14:37:15,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:15,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004047557] [2021-05-03 14:37:15,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665078143] [2021-05-03 14:37:15,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:15,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:37:15,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:15,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:15,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:15,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:15,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:15,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310850314] [2021-05-03 14:37:15,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:15,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:15,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:15,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:15,518 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:16,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:16,631 INFO L93 Difference]: Finished difference Result 233 states and 494 transitions. [2021-05-03 14:37:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:37:16,632 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:16,632 INFO L225 Difference]: With dead ends: 233 [2021-05-03 14:37:16,632 INFO L226 Difference]: Without dead ends: 233 [2021-05-03 14:37:16,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1000.0ms TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:37:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-03 14:37:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2021-05-03 14:37:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.186335403726708) internal successors, (352), 161 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 352 transitions. [2021-05-03 14:37:16,634 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 352 transitions. Word has length 19 [2021-05-03 14:37:16,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:16,634 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 352 transitions. [2021-05-03 14:37:16,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 352 transitions. [2021-05-03 14:37:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:16,635 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:16,635 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:16,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1547,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:16,835 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:16,836 INFO L82 PathProgramCache]: Analyzing trace with hash -284979574, now seen corresponding path program 310 times [2021-05-03 14:37:16,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:16,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939668485] [2021-05-03 14:37:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:17,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939668485] [2021-05-03 14:37:17,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492131620] [2021-05-03 14:37:17,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:17,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:17,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:17,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:17,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:17,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:17,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:17,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:17,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:17,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:17,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:17,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:17,404 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:37:17,404 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:17,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:37:17,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:17,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:17,434 INFO L518 ElimStorePlain]: Eliminatee v_prenex_283 vanished before elimination [2021-05-03 14:37:17,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:17,435 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:37:17,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:17,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:17,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:17,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617337893] [2021-05-03 14:37:17,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:17,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:17,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:17,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:17,488 INFO L87 Difference]: Start difference. First operand 162 states and 352 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:18,273 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-05-03 14:37:18,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:18,349 INFO L93 Difference]: Finished difference Result 185 states and 397 transitions. [2021-05-03 14:37:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:37:18,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:18,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:18,350 INFO L225 Difference]: With dead ends: 185 [2021-05-03 14:37:18,350 INFO L226 Difference]: Without dead ends: 185 [2021-05-03 14:37:18,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 822.0ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:37:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-03 14:37:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 158. [2021-05-03 14:37:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1910828025477707) internal successors, (344), 157 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 344 transitions. [2021-05-03 14:37:18,352 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 344 transitions. Word has length 19 [2021-05-03 14:37:18,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:18,352 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 344 transitions. [2021-05-03 14:37:18,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:18,352 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 344 transitions. [2021-05-03 14:37:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:18,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:18,353 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:18,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1557,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:18,553 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:18,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:18,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1084115286, now seen corresponding path program 311 times [2021-05-03 14:37:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:18,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144410815] [2021-05-03 14:37:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:18,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144410815] [2021-05-03 14:37:18,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184241507] [2021-05-03 14:37:18,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:18,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:37:18,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:18,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:18,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:18,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:18,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:18,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:18,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330041286] [2021-05-03 14:37:18,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:18,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:18,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:18,983 INFO L87 Difference]: Start difference. First operand 158 states and 344 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:19,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:19,512 INFO L93 Difference]: Finished difference Result 199 states and 426 transitions. [2021-05-03 14:37:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:37:19,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:19,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:19,513 INFO L225 Difference]: With dead ends: 199 [2021-05-03 14:37:19,513 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 14:37:19,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:37:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 14:37:19,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 161. [2021-05-03 14:37:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:37:19,515 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:37:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:19,515 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:37:19,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:19,515 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:37:19,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:19,515 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:19,515 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:19,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1564 [2021-05-03 14:37:19,716 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:19,716 INFO L82 PathProgramCache]: Analyzing trace with hash 724198768, now seen corresponding path program 312 times [2021-05-03 14:37:19,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:19,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113743172] [2021-05-03 14:37:19,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:19,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:19,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113743172] [2021-05-03 14:37:19,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79093466] [2021-05-03 14:37:19,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:19,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:37:19,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:19,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:19,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:20,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:20,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:20,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:20,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:20,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:20,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:20,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:20,160 INFO L628 ElimStorePlain]: treesize reduction 74, result has 38.8 percent of original size [2021-05-03 14:37:20,160 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:20,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:20,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:37:20,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:20,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:20,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:20,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:37:20,206 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:37:20,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:20,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:20,238 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:37:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:20,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:20,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:20,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831511675] [2021-05-03 14:37:20,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:20,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:20,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:20,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:20,320 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:20,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:20,925 INFO L93 Difference]: Finished difference Result 222 states and 471 transitions. [2021-05-03 14:37:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:37:20,926 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:20,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:20,927 INFO L225 Difference]: With dead ends: 222 [2021-05-03 14:37:20,927 INFO L226 Difference]: Without dead ends: 222 [2021-05-03 14:37:20,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:37:20,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-03 14:37:20,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 162. [2021-05-03 14:37:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.186335403726708) internal successors, (352), 161 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:20,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 352 transitions. [2021-05-03 14:37:20,929 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 352 transitions. Word has length 19 [2021-05-03 14:37:20,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:20,929 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 352 transitions. [2021-05-03 14:37:20,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 352 transitions. [2021-05-03 14:37:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:20,929 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:20,929 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:21,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1568,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:21,130 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1434246538, now seen corresponding path program 313 times [2021-05-03 14:37:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:21,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571581799] [2021-05-03 14:37:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:21,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571581799] [2021-05-03 14:37:21,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149509142] [2021-05-03 14:37:21,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:21,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:21,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:21,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:21,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:21,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:21,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:21,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:21,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:21,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:21,645 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:37:21,646 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:21,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:37:21,651 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:21,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:21,678 INFO L518 ElimStorePlain]: Eliminatee v_prenex_289 vanished before elimination [2021-05-03 14:37:21,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:21,679 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:37:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:21,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:21,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:21,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85371734] [2021-05-03 14:37:21,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:21,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:21,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:21,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:21,731 INFO L87 Difference]: Start difference. First operand 162 states and 352 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:22,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:22,363 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-05-03 14:37:22,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:37:22,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:22,365 INFO L225 Difference]: With dead ends: 189 [2021-05-03 14:37:22,365 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 14:37:22,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:37:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 14:37:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 160. [2021-05-03 14:37:22,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.188679245283019) internal successors, (348), 159 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 348 transitions. [2021-05-03 14:37:22,366 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 348 transitions. Word has length 19 [2021-05-03 14:37:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:22,367 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 348 transitions. [2021-05-03 14:37:22,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 348 transitions. [2021-05-03 14:37:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:22,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:22,367 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:22,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1572 [2021-05-03 14:37:22,567 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:22,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:22,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1382585352, now seen corresponding path program 314 times [2021-05-03 14:37:22,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:22,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824846414] [2021-05-03 14:37:22,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:22,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824846414] [2021-05-03 14:37:22,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542944537] [2021-05-03 14:37:22,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:22,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:22,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:22,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:22,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:22,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:22,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:22,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:22,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:22,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:22,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:22,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:37:22,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:22,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:22,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:22,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:37:22,927 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:22,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:22,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:22,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:23,017 INFO L628 ElimStorePlain]: treesize reduction 69, result has 37.8 percent of original size [2021-05-03 14:37:23,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:23,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:37:23,024 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:37:23,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:23,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:23,056 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-05-03 14:37:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:23,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:23,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:23,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163901227] [2021-05-03 14:37:23,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:23,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:23,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:23,144 INFO L87 Difference]: Start difference. First operand 160 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:23,854 INFO L93 Difference]: Finished difference Result 196 states and 412 transitions. [2021-05-03 14:37:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:23,856 INFO L225 Difference]: With dead ends: 196 [2021-05-03 14:37:23,856 INFO L226 Difference]: Without dead ends: 196 [2021-05-03 14:37:23,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 540.6ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:37:23,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-03 14:37:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 162. [2021-05-03 14:37:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1925465838509317) internal successors, (353), 161 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 353 transitions. [2021-05-03 14:37:23,858 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 353 transitions. Word has length 19 [2021-05-03 14:37:23,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:23,858 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 353 transitions. [2021-05-03 14:37:23,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 353 transitions. [2021-05-03 14:37:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:23,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:23,858 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:24,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:24,059 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:24,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:24,059 INFO L82 PathProgramCache]: Analyzing trace with hash -672537582, now seen corresponding path program 315 times [2021-05-03 14:37:24,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:24,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742180970] [2021-05-03 14:37:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:24,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742180970] [2021-05-03 14:37:24,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433727112] [2021-05-03 14:37:24,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:24,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:37:24,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:24,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:24,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:24,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:24,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:24,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:24,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:24,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:24,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:24,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:24,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:24,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:24,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:24,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:37:24,424 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:24,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:24,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:24,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:24,491 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:37:24,491 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:24,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:24,492 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:37:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:24,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:24,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:24,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13660632] [2021-05-03 14:37:24,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:24,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:24,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:24,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:24,540 INFO L87 Difference]: Start difference. First operand 162 states and 353 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:25,484 INFO L93 Difference]: Finished difference Result 245 states and 507 transitions. [2021-05-03 14:37:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:37:25,485 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:25,485 INFO L225 Difference]: With dead ends: 245 [2021-05-03 14:37:25,485 INFO L226 Difference]: Without dead ends: 245 [2021-05-03 14:37:25,486 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 787.7ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:37:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-03 14:37:25,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 163. [2021-05-03 14:37:25,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2098765432098766) internal successors, (358), 162 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 358 transitions. [2021-05-03 14:37:25,487 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 358 transitions. Word has length 19 [2021-05-03 14:37:25,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:25,488 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 358 transitions. [2021-05-03 14:37:25,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:25,488 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 358 transitions. [2021-05-03 14:37:25,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:25,492 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:25,492 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:25,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1583 [2021-05-03 14:37:25,709 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:25,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:25,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1389377720, now seen corresponding path program 316 times [2021-05-03 14:37:25,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:25,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613460618] [2021-05-03 14:37:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:25,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:25,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613460618] [2021-05-03 14:37:25,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210393659] [2021-05-03 14:37:25,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:25,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:25,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:25,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:25,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:26,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:26,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:26,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648322452] [2021-05-03 14:37:26,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:26,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:26,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:26,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:26,070 INFO L87 Difference]: Start difference. First operand 163 states and 358 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:26,747 INFO L93 Difference]: Finished difference Result 172 states and 371 transitions. [2021-05-03 14:37:26,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:37:26,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:26,749 INFO L225 Difference]: With dead ends: 172 [2021-05-03 14:37:26,749 INFO L226 Difference]: Without dead ends: 168 [2021-05-03 14:37:26,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 616.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:37:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-03 14:37:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2021-05-03 14:37:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2037037037037037) internal successors, (357), 162 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:26,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 357 transitions. [2021-05-03 14:37:26,751 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 357 transitions. Word has length 19 [2021-05-03 14:37:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:26,751 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 357 transitions. [2021-05-03 14:37:26,751 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 357 transitions. [2021-05-03 14:37:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:26,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:26,751 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:26,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1593,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:26,952 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:26,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1476258954, now seen corresponding path program 317 times [2021-05-03 14:37:26,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:26,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827132601] [2021-05-03 14:37:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:26,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:27,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827132601] [2021-05-03 14:37:27,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366341108] [2021-05-03 14:37:27,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:27,121 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:37:27,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:27,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:27,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:27,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:27,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:27,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:37:27,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:27,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:27,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:27,309 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:27,332 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:37:27,332 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:27,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:27,333 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:37:27,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:27,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:27,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:27,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048738846] [2021-05-03 14:37:27,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:27,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:27,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:27,345 INFO L87 Difference]: Start difference. First operand 163 states and 357 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:27,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:27,910 INFO L93 Difference]: Finished difference Result 198 states and 424 transitions. [2021-05-03 14:37:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:37:27,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:27,911 INFO L225 Difference]: With dead ends: 198 [2021-05-03 14:37:27,911 INFO L226 Difference]: Without dead ends: 198 [2021-05-03 14:37:27,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:37:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-03 14:37:27,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 159. [2021-05-03 14:37:27,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.189873417721519) internal successors, (346), 158 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:27,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 346 transitions. [2021-05-03 14:37:27,913 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 346 transitions. Word has length 19 [2021-05-03 14:37:27,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:27,913 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 346 transitions. [2021-05-03 14:37:27,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 346 transitions. [2021-05-03 14:37:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:27,914 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:27,914 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:28,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1597 [2021-05-03 14:37:28,114 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:28,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:28,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2026583664, now seen corresponding path program 318 times [2021-05-03 14:37:28,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:28,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980675699] [2021-05-03 14:37:28,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:28,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980675699] [2021-05-03 14:37:28,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681255762] [2021-05-03 14:37:28,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:28,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:37:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:28,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:28,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:28,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:28,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:28,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:37:28,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:28,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:28,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:28,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:37:28,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:28,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:28,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:28,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:28,546 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:28,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:28,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:28,552 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:28,628 INFO L628 ElimStorePlain]: treesize reduction 77, result has 30.6 percent of original size [2021-05-03 14:37:28,629 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:28,631 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:28,631 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-05-03 14:37:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:28,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:28,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:28,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480515164] [2021-05-03 14:37:28,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:28,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:28,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:28,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:28,720 INFO L87 Difference]: Start difference. First operand 159 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:29,345 INFO L93 Difference]: Finished difference Result 207 states and 435 transitions. [2021-05-03 14:37:29,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:37:29,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:29,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:29,347 INFO L225 Difference]: With dead ends: 207 [2021-05-03 14:37:29,347 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 14:37:29,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 611.6ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:37:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 14:37:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2021-05-03 14:37:29,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.198757763975155) internal successors, (354), 161 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:29,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 354 transitions. [2021-05-03 14:37:29,349 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 354 transitions. Word has length 19 [2021-05-03 14:37:29,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:29,349 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 354 transitions. [2021-05-03 14:37:29,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:29,349 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 354 transitions. [2021-05-03 14:37:29,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:29,349 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:29,349 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:29,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1601 [2021-05-03 14:37:29,550 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:29,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1558335862, now seen corresponding path program 319 times [2021-05-03 14:37:29,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:29,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476973624] [2021-05-03 14:37:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476973624] [2021-05-03 14:37:29,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548875971] [2021-05-03 14:37:29,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:29,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:29,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:29,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:29,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:29,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:37:29,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:29,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:29,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:29,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:29,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:29,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:29,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:29,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:29,977 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:29,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:29,983 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:30,043 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:37:30,044 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:30,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:30,045 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:37:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:30,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:30,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:30,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548912528] [2021-05-03 14:37:30,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:30,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:30,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:30,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:30,099 INFO L87 Difference]: Start difference. First operand 162 states and 354 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:31,204 INFO L93 Difference]: Finished difference Result 255 states and 529 transitions. [2021-05-03 14:37:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:37:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:31,205 INFO L225 Difference]: With dead ends: 255 [2021-05-03 14:37:31,205 INFO L226 Difference]: Without dead ends: 255 [2021-05-03 14:37:31,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1026.2ms TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:37:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-03 14:37:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 164. [2021-05-03 14:37:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.2208588957055215) internal successors, (362), 163 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 362 transitions. [2021-05-03 14:37:31,207 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 362 transitions. Word has length 19 [2021-05-03 14:37:31,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:31,208 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 362 transitions. [2021-05-03 14:37:31,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 362 transitions. [2021-05-03 14:37:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:31,208 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:31,208 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:31,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1605,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:31,408 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:31,409 INFO L82 PathProgramCache]: Analyzing trace with hash 503579440, now seen corresponding path program 320 times [2021-05-03 14:37:31,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:31,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845896760] [2021-05-03 14:37:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845896760] [2021-05-03 14:37:31,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608549840] [2021-05-03 14:37:31,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:31,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:31,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:31,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:31,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:31,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:31,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642265386] [2021-05-03 14:37:31,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:31,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:31,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:31,855 INFO L87 Difference]: Start difference. First operand 164 states and 362 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:32,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:32,413 INFO L93 Difference]: Finished difference Result 178 states and 383 transitions. [2021-05-03 14:37:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:32,414 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:32,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:32,414 INFO L225 Difference]: With dead ends: 178 [2021-05-03 14:37:32,414 INFO L226 Difference]: Without dead ends: 174 [2021-05-03 14:37:32,414 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 580.9ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:37:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-03 14:37:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2021-05-03 14:37:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.214723926380368) internal successors, (361), 163 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:32,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 361 transitions. [2021-05-03 14:37:32,416 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 361 transitions. Word has length 19 [2021-05-03 14:37:32,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:32,416 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 361 transitions. [2021-05-03 14:37:32,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 361 transitions. [2021-05-03 14:37:32,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:32,416 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:32,416 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:32,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1617,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:32,617 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:32,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:32,617 INFO L82 PathProgramCache]: Analyzing trace with hash 590460674, now seen corresponding path program 321 times [2021-05-03 14:37:32,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:32,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438466208] [2021-05-03 14:37:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:32,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438466208] [2021-05-03 14:37:32,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363453410] [2021-05-03 14:37:32,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:32,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:37:32,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:32,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:32,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:33,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:33,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:33,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:37:33,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:33,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:33,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:33,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:33,064 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:37:33,064 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:33,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:33,066 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:37:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:33,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:33,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:33,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700130840] [2021-05-03 14:37:33,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:33,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:33,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:33,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:33,081 INFO L87 Difference]: Start difference. First operand 164 states and 361 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:33,902 INFO L93 Difference]: Finished difference Result 211 states and 450 transitions. [2021-05-03 14:37:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:37:33,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:33,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:33,903 INFO L225 Difference]: With dead ends: 211 [2021-05-03 14:37:33,903 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 14:37:33,903 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 772.3ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:37:33,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 14:37:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 163. [2021-05-03 14:37:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2160493827160495) internal successors, (359), 162 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 359 transitions. [2021-05-03 14:37:33,905 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 359 transitions. Word has length 19 [2021-05-03 14:37:33,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:33,905 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 359 transitions. [2021-05-03 14:37:33,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:33,905 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 359 transitions. [2021-05-03 14:37:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:33,905 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:33,905 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:34,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1621 [2021-05-03 14:37:34,106 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:34,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:34,106 INFO L82 PathProgramCache]: Analyzing trace with hash -2766826, now seen corresponding path program 322 times [2021-05-03 14:37:34,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:34,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822641715] [2021-05-03 14:37:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:34,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822641715] [2021-05-03 14:37:34,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198950667] [2021-05-03 14:37:34,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:34,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:34,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:34,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:34,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:34,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:34,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:37:34,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207019670] [2021-05-03 14:37:34,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:37:34,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:34,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:37:34,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:37:34,543 INFO L87 Difference]: Start difference. First operand 163 states and 359 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:35,079 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-05-03 14:37:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:35,117 INFO L93 Difference]: Finished difference Result 174 states and 375 transitions. [2021-05-03 14:37:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:37:35,118 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:35,119 INFO L225 Difference]: With dead ends: 174 [2021-05-03 14:37:35,119 INFO L226 Difference]: Without dead ends: 168 [2021-05-03 14:37:35,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 620.3ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:37:35,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-03 14:37:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 163. [2021-05-03 14:37:35,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.2098765432098766) internal successors, (358), 162 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 358 transitions. [2021-05-03 14:37:35,120 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 358 transitions. Word has length 19 [2021-05-03 14:37:35,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:35,121 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 358 transitions. [2021-05-03 14:37:35,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:35,121 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 358 transitions. [2021-05-03 14:37:35,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:35,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:35,121 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:35,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1625,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:35,321 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:35,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:35,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1516323446, now seen corresponding path program 323 times [2021-05-03 14:37:35,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:35,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116964749] [2021-05-03 14:37:35,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:35,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:35,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116964749] [2021-05-03 14:37:35,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70044633] [2021-05-03 14:37:35,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:35,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:37:35,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:35,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:35,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:35,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:35,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:35,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:35,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:35,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:35,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:35,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:35,705 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:37:35,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:35,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:37:35,711 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:37:35,719 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:35,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:35,720 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:37:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:35,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:35,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:35,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855723589] [2021-05-03 14:37:35,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:35,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:35,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:35,761 INFO L87 Difference]: Start difference. First operand 163 states and 358 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:36,243 INFO L93 Difference]: Finished difference Result 195 states and 417 transitions. [2021-05-03 14:37:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:37:36,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:36,245 INFO L225 Difference]: With dead ends: 195 [2021-05-03 14:37:36,245 INFO L226 Difference]: Without dead ends: 195 [2021-05-03 14:37:36,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:37:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-03 14:37:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 160. [2021-05-03 14:37:36,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.188679245283019) internal successors, (348), 159 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:36,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 348 transitions. [2021-05-03 14:37:36,247 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 348 transitions. Word has length 19 [2021-05-03 14:37:36,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:36,247 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 348 transitions. [2021-05-03 14:37:36,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 348 transitions. [2021-05-03 14:37:36,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:36,247 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:36,247 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:36,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1629,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:36,448 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash -954493294, now seen corresponding path program 324 times [2021-05-03 14:37:36,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:36,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637510193] [2021-05-03 14:37:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:36,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637510193] [2021-05-03 14:37:36,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779786884] [2021-05-03 14:37:36,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:36,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:37:36,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:36,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:36,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:36,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:36,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:36,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:36,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:36,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:36,949 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:36,983 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-05-03 14:37:36,983 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:36,985 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:36,985 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:37:37,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:37,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:37,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:37,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039384454] [2021-05-03 14:37:37,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:37,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:37,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:37,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:37,024 INFO L87 Difference]: Start difference. First operand 160 states and 348 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:37,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:37,371 INFO L93 Difference]: Finished difference Result 180 states and 388 transitions. [2021-05-03 14:37:37,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:37:37,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:37,373 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:37:37,373 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:37:37,373 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:37,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:37:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 161. [2021-05-03 14:37:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:37:37,375 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:37:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:37,375 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:37:37,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:37:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:37,375 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:37,375 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:37,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1630 [2021-05-03 14:37:37,576 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash -438162418, now seen corresponding path program 325 times [2021-05-03 14:37:37,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:37,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397287485] [2021-05-03 14:37:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:37,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:37,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397287485] [2021-05-03 14:37:37,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956374793] [2021-05-03 14:37:37,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:37,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:38,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:38,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:38,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759350347] [2021-05-03 14:37:38,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:38,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:38,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:38,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:38,095 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:38,449 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:37:38,653 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-05-03 14:37:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:38,889 INFO L93 Difference]: Finished difference Result 174 states and 371 transitions. [2021-05-03 14:37:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:37:38,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:38,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:38,891 INFO L225 Difference]: With dead ends: 174 [2021-05-03 14:37:38,891 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:37:38,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 785.5ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:37:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:37:38,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2021-05-03 14:37:38,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:38,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:37:38,893 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:37:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:38,893 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:37:38,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:37:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:38,893 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:38,893 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:39,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1632 [2021-05-03 14:37:39,094 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:39,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:39,094 INFO L82 PathProgramCache]: Analyzing trace with hash -887938366, now seen corresponding path program 326 times [2021-05-03 14:37:39,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:39,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371124915] [2021-05-03 14:37:39,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:39,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371124915] [2021-05-03 14:37:39,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288727873] [2021-05-03 14:37:39,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:39,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:39,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:39,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:39,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:39,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:39,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:39,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:39,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:39,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:39,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:39,616 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:39,652 INFO L628 ElimStorePlain]: treesize reduction 38, result has 28.3 percent of original size [2021-05-03 14:37:39,652 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:39,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:39,654 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:37:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:39,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:39,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:39,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670986510] [2021-05-03 14:37:39,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:39,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:39,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:39,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:39,693 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:40,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:40,481 INFO L93 Difference]: Finished difference Result 202 states and 432 transitions. [2021-05-03 14:37:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:40,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:40,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:40,482 INFO L225 Difference]: With dead ends: 202 [2021-05-03 14:37:40,482 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 14:37:40,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 789.5ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:37:40,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 14:37:40,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 162. [2021-05-03 14:37:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.186335403726708) internal successors, (352), 161 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:40,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 352 transitions. [2021-05-03 14:37:40,484 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 352 transitions. Word has length 19 [2021-05-03 14:37:40,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:40,484 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 352 transitions. [2021-05-03 14:37:40,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:40,485 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 352 transitions. [2021-05-03 14:37:40,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:40,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:40,485 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:40,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1638,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:40,685 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:40,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:40,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2132717422, now seen corresponding path program 327 times [2021-05-03 14:37:40,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:40,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165607775] [2021-05-03 14:37:40,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:40,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165607775] [2021-05-03 14:37:40,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541219214] [2021-05-03 14:37:40,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:40,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:37:40,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:40,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:40,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:41,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:41,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:41,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558706743] [2021-05-03 14:37:41,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:41,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:41,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:41,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:41,221 INFO L87 Difference]: Start difference. First operand 162 states and 352 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:42,148 INFO L93 Difference]: Finished difference Result 214 states and 455 transitions. [2021-05-03 14:37:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:37:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:42,150 INFO L225 Difference]: With dead ends: 214 [2021-05-03 14:37:42,150 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 14:37:42,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 961.4ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:37:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 14:37:42,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2021-05-03 14:37:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.185185185185185) internal successors, (354), 162 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 354 transitions. [2021-05-03 14:37:42,152 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 354 transitions. Word has length 19 [2021-05-03 14:37:42,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:42,152 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 354 transitions. [2021-05-03 14:37:42,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:42,152 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 354 transitions. [2021-05-03 14:37:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:42,152 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:42,152 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:42,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1640,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:42,353 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:42,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:42,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1802333356, now seen corresponding path program 328 times [2021-05-03 14:37:42,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:42,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321089597] [2021-05-03 14:37:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:42,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321089597] [2021-05-03 14:37:42,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475649448] [2021-05-03 14:37:42,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:42,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:42,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:42,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:42,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:42,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:42,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:42,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:42,919 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2021-05-03 14:37:42,919 INFO L628 ElimStorePlain]: treesize reduction 78, result has 35.5 percent of original size [2021-05-03 14:37:42,920 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:42,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:37:42,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:42,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:42,956 INFO L518 ElimStorePlain]: Eliminatee v_prenex_295 vanished before elimination [2021-05-03 14:37:42,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:42,958 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:37:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:43,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:43,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:43,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788340725] [2021-05-03 14:37:43,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:43,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:43,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:43,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:43,055 INFO L87 Difference]: Start difference. First operand 163 states and 354 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:44,439 INFO L93 Difference]: Finished difference Result 224 states and 475 transitions. [2021-05-03 14:37:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:37:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:44,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:44,441 INFO L225 Difference]: With dead ends: 224 [2021-05-03 14:37:44,441 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 14:37:44,441 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1158.8ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:37:44,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 14:37:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 164. [2021-05-03 14:37:44,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.184049079754601) internal successors, (356), 163 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:44,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 356 transitions. [2021-05-03 14:37:44,444 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 356 transitions. Word has length 19 [2021-05-03 14:37:44,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:44,444 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 356 transitions. [2021-05-03 14:37:44,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 356 transitions. [2021-05-03 14:37:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:44,444 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:44,444 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:44,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1644 [2021-05-03 14:37:44,666 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:44,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1782586170, now seen corresponding path program 329 times [2021-05-03 14:37:44,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:44,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42433160] [2021-05-03 14:37:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:44,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42433160] [2021-05-03 14:37:44,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901890130] [2021-05-03 14:37:44,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:44,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:37:44,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:45,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:45,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:45,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:45,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:45,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:45,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:45,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:45,415 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:37:45,415 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:45,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:37:45,420 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:45,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:45,449 INFO L518 ElimStorePlain]: Eliminatee v_prenex_298 vanished before elimination [2021-05-03 14:37:45,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:45,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:37:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:45,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:45,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:45,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88134328] [2021-05-03 14:37:45,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:45,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:45,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:45,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:45,515 INFO L87 Difference]: Start difference. First operand 164 states and 356 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:46,422 INFO L93 Difference]: Finished difference Result 181 states and 390 transitions. [2021-05-03 14:37:46,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:37:46,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:46,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:46,424 INFO L225 Difference]: With dead ends: 181 [2021-05-03 14:37:46,424 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:37:46,424 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1002.3ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:37:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:37:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 160. [2021-05-03 14:37:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.188679245283019) internal successors, (348), 159 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 348 transitions. [2021-05-03 14:37:46,425 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 348 transitions. Word has length 19 [2021-05-03 14:37:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:46,426 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 348 transitions. [2021-05-03 14:37:46,426 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:46,426 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 348 transitions. [2021-05-03 14:37:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:46,426 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:46,426 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:46,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1648,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:46,626 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:46,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2128105322, now seen corresponding path program 330 times [2021-05-03 14:37:46,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:46,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572981065] [2021-05-03 14:37:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:46,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:46,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572981065] [2021-05-03 14:37:46,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390404610] [2021-05-03 14:37:46,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:46,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:37:46,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:46,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:46,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:47,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:47,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:47,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:47,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727296742] [2021-05-03 14:37:47,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:47,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:47,149 INFO L87 Difference]: Start difference. First operand 160 states and 348 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:47,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:47,523 INFO L93 Difference]: Finished difference Result 173 states and 369 transitions. [2021-05-03 14:37:47,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:37:47,524 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:47,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:47,524 INFO L225 Difference]: With dead ends: 173 [2021-05-03 14:37:47,524 INFO L226 Difference]: Without dead ends: 164 [2021-05-03 14:37:47,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 502.5ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:37:47,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-03 14:37:47,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2021-05-03 14:37:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:47,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:37:47,526 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:37:47,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:47,526 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:37:47,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:47,526 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:37:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:47,526 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:47,526 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:47,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1655 [2021-05-03 14:37:47,727 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:47,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:47,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1717086026, now seen corresponding path program 331 times [2021-05-03 14:37:47,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:47,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618932995] [2021-05-03 14:37:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:47,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618932995] [2021-05-03 14:37:47,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540021361] [2021-05-03 14:37:47,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:47,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:47,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:48,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:48,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:48,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:48,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:48,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:48,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:48,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:48,218 INFO L628 ElimStorePlain]: treesize reduction 36, result has 29.4 percent of original size [2021-05-03 14:37:48,218 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:48,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:48,220 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:37:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:48,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:48,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:48,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586755755] [2021-05-03 14:37:48,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:48,260 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:48,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:48,605 INFO L93 Difference]: Finished difference Result 191 states and 410 transitions. [2021-05-03 14:37:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:37:48,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:48,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:48,607 INFO L225 Difference]: With dead ends: 191 [2021-05-03 14:37:48,607 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:37:48,607 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:37:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:37:48,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 161. [2021-05-03 14:37:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:48,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:37:48,609 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:37:48,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:48,609 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:37:48,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:48,609 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:37:48,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:48,609 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:48,609 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:48,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1660 [2021-05-03 14:37:48,810 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:48,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:48,810 INFO L82 PathProgramCache]: Analyzing trace with hash 472306970, now seen corresponding path program 332 times [2021-05-03 14:37:48,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:48,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993021887] [2021-05-03 14:37:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:48,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993021887] [2021-05-03 14:37:48,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363017592] [2021-05-03 14:37:48,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:49,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:49,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:49,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:49,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:49,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:49,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:49,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:49,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:49,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:49,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:49,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:49,363 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-05-03 14:37:49,363 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:49,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:37:49,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:37:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:49,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:49,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:49,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806333899] [2021-05-03 14:37:49,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:49,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:49,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:49,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:49,407 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:50,280 INFO L93 Difference]: Finished difference Result 207 states and 442 transitions. [2021-05-03 14:37:50,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:50,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:50,282 INFO L225 Difference]: With dead ends: 207 [2021-05-03 14:37:50,282 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 14:37:50,282 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 935.1ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:37:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 14:37:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 162. [2021-05-03 14:37:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.186335403726708) internal successors, (352), 161 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:50,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 352 transitions. [2021-05-03 14:37:50,284 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 352 transitions. Word has length 19 [2021-05-03 14:37:50,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:50,284 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 352 transitions. [2021-05-03 14:37:50,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:50,284 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 352 transitions. [2021-05-03 14:37:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:50,285 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:50,285 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:50,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1662 [2021-05-03 14:37:50,485 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash -537678518, now seen corresponding path program 333 times [2021-05-03 14:37:50,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:50,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138614744] [2021-05-03 14:37:50,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:50,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138614744] [2021-05-03 14:37:50,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905609437] [2021-05-03 14:37:50,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:50,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:37:50,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:50,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:51,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:51,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:51,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855826897] [2021-05-03 14:37:51,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:51,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:51,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:51,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:51,074 INFO L87 Difference]: Start difference. First operand 162 states and 352 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:52,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:52,023 INFO L93 Difference]: Finished difference Result 222 states and 472 transitions. [2021-05-03 14:37:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:37:52,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:52,025 INFO L225 Difference]: With dead ends: 222 [2021-05-03 14:37:52,025 INFO L226 Difference]: Without dead ends: 222 [2021-05-03 14:37:52,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 943.8ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:37:52,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-03 14:37:52,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 163. [2021-05-03 14:37:52,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.185185185185185) internal successors, (354), 162 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 354 transitions. [2021-05-03 14:37:52,027 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 354 transitions. Word has length 19 [2021-05-03 14:37:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:52,027 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 354 transitions. [2021-05-03 14:37:52,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 354 transitions. [2021-05-03 14:37:52,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:52,028 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:52,028 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:52,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1664,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:52,228 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:52,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1472507192, now seen corresponding path program 334 times [2021-05-03 14:37:52,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:52,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831985138] [2021-05-03 14:37:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:52,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:52,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831985138] [2021-05-03 14:37:52,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339884956] [2021-05-03 14:37:52,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:52,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:37:52,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:52,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:52,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:52,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:52,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:52,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:52,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:52,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:52,845 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:37:52,845 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:52,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:37:52,850 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:52,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:52,877 INFO L518 ElimStorePlain]: Eliminatee v_prenex_303 vanished before elimination [2021-05-03 14:37:52,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:52,879 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:37:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:52,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:52,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:52,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588203050] [2021-05-03 14:37:52,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:52,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:52,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:52,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:52,943 INFO L87 Difference]: Start difference. First operand 163 states and 354 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:53,487 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:37:53,699 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:37:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:53,774 INFO L93 Difference]: Finished difference Result 183 states and 397 transitions. [2021-05-03 14:37:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:37:53,775 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:53,775 INFO L225 Difference]: With dead ends: 183 [2021-05-03 14:37:53,775 INFO L226 Difference]: Without dead ends: 183 [2021-05-03 14:37:53,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 871.9ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:37:53,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-03 14:37:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 157. [2021-05-03 14:37:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1923076923076925) internal successors, (342), 156 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 342 transitions. [2021-05-03 14:37:53,777 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 342 transitions. Word has length 19 [2021-05-03 14:37:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:53,777 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 342 transitions. [2021-05-03 14:37:53,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:53,777 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 342 transitions. [2021-05-03 14:37:53,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:53,778 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:53,778 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:53,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1674 [2021-05-03 14:37:53,978 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:53,978 INFO L82 PathProgramCache]: Analyzing trace with hash 330970698, now seen corresponding path program 335 times [2021-05-03 14:37:53,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:53,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981596511] [2021-05-03 14:37:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:54,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981596511] [2021-05-03 14:37:54,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705333944] [2021-05-03 14:37:54,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:54,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:37:54,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:54,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:54,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:54,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:54,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:54,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741270646] [2021-05-03 14:37:54,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:54,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:54,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:54,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:54,506 INFO L87 Difference]: Start difference. First operand 157 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:54,946 INFO L93 Difference]: Finished difference Result 189 states and 406 transitions. [2021-05-03 14:37:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:54,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:54,948 INFO L225 Difference]: With dead ends: 189 [2021-05-03 14:37:54,948 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 14:37:54,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 14:37:54,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 157. [2021-05-03 14:37:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1923076923076925) internal successors, (342), 156 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:54,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 342 transitions. [2021-05-03 14:37:54,950 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 342 transitions. Word has length 19 [2021-05-03 14:37:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:54,950 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 342 transitions. [2021-05-03 14:37:54,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 342 transitions. [2021-05-03 14:37:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:54,950 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:54,950 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:55,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1681,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:55,151 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:55,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:55,151 INFO L82 PathProgramCache]: Analyzing trace with hash -913808358, now seen corresponding path program 336 times [2021-05-03 14:37:55,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:55,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949154262] [2021-05-03 14:37:55,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:55,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949154262] [2021-05-03 14:37:55,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152448469] [2021-05-03 14:37:55,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:55,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:37:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:55,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:55,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:55,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:55,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:55,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335741615] [2021-05-03 14:37:55,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:55,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:55,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:55,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:55,726 INFO L87 Difference]: Start difference. First operand 157 states and 342 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:56,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:56,654 INFO L93 Difference]: Finished difference Result 207 states and 442 transitions. [2021-05-03 14:37:56,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:37:56,655 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:56,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:56,656 INFO L225 Difference]: With dead ends: 207 [2021-05-03 14:37:56,656 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 14:37:56,656 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 823.8ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:37:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 14:37:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 157. [2021-05-03 14:37:56,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1923076923076925) internal successors, (342), 156 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 342 transitions. [2021-05-03 14:37:56,658 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 342 transitions. Word has length 19 [2021-05-03 14:37:56,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:56,658 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 342 transitions. [2021-05-03 14:37:56,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:56,658 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 342 transitions. [2021-05-03 14:37:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:56,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:56,658 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:56,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1685 [2021-05-03 14:37:56,859 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:56,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:56,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1699862378, now seen corresponding path program 337 times [2021-05-03 14:37:56,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:56,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739883998] [2021-05-03 14:37:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:57,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739883998] [2021-05-03 14:37:57,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103088575] [2021-05-03 14:37:57,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:57,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:37:57,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:57,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:57,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:57,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:37:57,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:57,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:57,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:37:57,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:57,546 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:37:57,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:37:57,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:57,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:57,583 INFO L518 ElimStorePlain]: Eliminatee v_prenex_307 vanished before elimination [2021-05-03 14:37:57,583 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:57,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:57,585 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:37:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:57,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:57,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:37:57,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102783390] [2021-05-03 14:37:57,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:37:57,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:57,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:37:57,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:37:57,663 INFO L87 Difference]: Start difference. First operand 157 states and 342 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:58,108 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2021-05-03 14:37:58,849 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2021-05-03 14:37:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:37:58,880 INFO L93 Difference]: Finished difference Result 197 states and 413 transitions. [2021-05-03 14:37:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:37:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:37:58,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:37:58,882 INFO L225 Difference]: With dead ends: 197 [2021-05-03 14:37:58,883 INFO L226 Difference]: Without dead ends: 194 [2021-05-03 14:37:58,883 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1166.6ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:37:58,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-03 14:37:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 161. [2021-05-03 14:37:58,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:58,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:37:58,885 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:37:58,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:37:58,885 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:37:58,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:37:58,885 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:37:58,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:37:58,885 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:37:58,885 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:37:59,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1689 [2021-05-03 14:37:59,086 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:37:59,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:37:59,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1273724876, now seen corresponding path program 338 times [2021-05-03 14:37:59,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:37:59,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548265610] [2021-05-03 14:37:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:37:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:37:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:59,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548265610] [2021-05-03 14:37:59,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240229940] [2021-05-03 14:37:59,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:37:59,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:37:59,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:37:59,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:37:59,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:37:59,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:59,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:59,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:37:59,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:59,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:37:59,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:37:59,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:59,696 INFO L628 ElimStorePlain]: treesize reduction 80, result has 35.0 percent of original size [2021-05-03 14:37:59,696 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:37:59,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:37:59,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:37:59,728 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:37:59,729 INFO L518 ElimStorePlain]: Eliminatee v_prenex_310 vanished before elimination [2021-05-03 14:37:59,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:37:59,731 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:37:59,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:37:59,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:37:59,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:37:59,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821512814] [2021-05-03 14:37:59,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:37:59,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:37:59,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:37:59,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:37:59,824 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:00,845 INFO L93 Difference]: Finished difference Result 230 states and 488 transitions. [2021-05-03 14:38:00,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:38:00,846 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:00,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:00,846 INFO L225 Difference]: With dead ends: 230 [2021-05-03 14:38:00,846 INFO L226 Difference]: Without dead ends: 230 [2021-05-03 14:38:00,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 913.8ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:38:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-03 14:38:00,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 161. [2021-05-03 14:38:00,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1875) internal successors, (350), 160 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:00,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 350 transitions. [2021-05-03 14:38:00,848 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 350 transitions. Word has length 19 [2021-05-03 14:38:00,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:00,848 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 350 transitions. [2021-05-03 14:38:00,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:00,848 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 350 transitions. [2021-05-03 14:38:00,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:00,848 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:00,848 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:01,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1697 [2021-05-03 14:38:01,049 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:01,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:01,049 INFO L82 PathProgramCache]: Analyzing trace with hash -563677106, now seen corresponding path program 339 times [2021-05-03 14:38:01,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:01,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408883506] [2021-05-03 14:38:01,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:01,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:01,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408883506] [2021-05-03 14:38:01,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081410944] [2021-05-03 14:38:01,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:01,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:38:01,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:01,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:01,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:01,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:38:01,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:01,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:01,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:38:01,568 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:01,651 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:38:01,652 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:38:01,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:38:01,657 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:01,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:01,684 INFO L518 ElimStorePlain]: Eliminatee v_prenex_313 vanished before elimination [2021-05-03 14:38:01,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:01,686 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:38:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:01,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:01,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:01,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099542768] [2021-05-03 14:38:01,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:01,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:01,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:01,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:01,773 INFO L87 Difference]: Start difference. First operand 161 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:02,370 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:38:02,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:02,659 INFO L93 Difference]: Finished difference Result 182 states and 392 transitions. [2021-05-03 14:38:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:38:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:02,661 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:38:02,661 INFO L226 Difference]: Without dead ends: 182 [2021-05-03 14:38:02,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 877.1ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:02,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-03 14:38:02,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 154. [2021-05-03 14:38:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.189542483660131) internal successors, (335), 153 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:02,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 335 transitions. [2021-05-03 14:38:02,662 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 335 transitions. Word has length 19 [2021-05-03 14:38:02,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:02,662 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 335 transitions. [2021-05-03 14:38:02,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:02,662 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 335 transitions. [2021-05-03 14:38:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:02,662 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:02,663 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:02,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1701 [2021-05-03 14:38:02,863 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:02,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:02,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1799606638, now seen corresponding path program 340 times [2021-05-03 14:38:02,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:02,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942614550] [2021-05-03 14:38:02,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:03,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942614550] [2021-05-03 14:38:03,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257661356] [2021-05-03 14:38:03,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:03,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:03,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:03,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:03,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:03,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:03,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:03,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:03,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876697252] [2021-05-03 14:38:03,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:03,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:03,405 INFO L87 Difference]: Start difference. First operand 154 states and 335 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:03,835 INFO L93 Difference]: Finished difference Result 192 states and 411 transitions. [2021-05-03 14:38:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:38:03,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:03,837 INFO L225 Difference]: With dead ends: 192 [2021-05-03 14:38:03,837 INFO L226 Difference]: Without dead ends: 192 [2021-05-03 14:38:03,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:03,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-03 14:38:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2021-05-03 14:38:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1870967741935483) internal successors, (339), 155 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 339 transitions. [2021-05-03 14:38:03,839 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 339 transitions. Word has length 19 [2021-05-03 14:38:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:03,839 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 339 transitions. [2021-05-03 14:38:03,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:03,839 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 339 transitions. [2021-05-03 14:38:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:03,839 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:03,839 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:04,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1708,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:04,040 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:04,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2135444140, now seen corresponding path program 341 times [2021-05-03 14:38:04,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:04,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526609630] [2021-05-03 14:38:04,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:04,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526609630] [2021-05-03 14:38:04,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892329106] [2021-05-03 14:38:04,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:04,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:38:04,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:04,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:04,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:04,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:04,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:04,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:04,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62047172] [2021-05-03 14:38:04,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:04,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:04,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:04,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:04,564 INFO L87 Difference]: Start difference. First operand 156 states and 339 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:05,166 INFO L93 Difference]: Finished difference Result 218 states and 464 transitions. [2021-05-03 14:38:05,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:38:05,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:05,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:05,168 INFO L225 Difference]: With dead ends: 218 [2021-05-03 14:38:05,168 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 14:38:05,168 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 14:38:05,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 157. [2021-05-03 14:38:05,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1858974358974357) internal successors, (341), 156 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 341 transitions. [2021-05-03 14:38:05,170 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 341 transitions. Word has length 19 [2021-05-03 14:38:05,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:05,170 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 341 transitions. [2021-05-03 14:38:05,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 341 transitions. [2021-05-03 14:38:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:05,170 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:05,170 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:05,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1712,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:05,370 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:05,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:05,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1449475386, now seen corresponding path program 342 times [2021-05-03 14:38:05,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:05,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364693697] [2021-05-03 14:38:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:05,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:05,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364693697] [2021-05-03 14:38:05,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577217672] [2021-05-03 14:38:05,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:05,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:38:05,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:05,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:05,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:05,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:05,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:05,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:05,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:05,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:05,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:05,837 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:05,944 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-03 14:38:05,945 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-05-03 14:38:05,945 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:38:05,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:05,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:05,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:05,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:05,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:05,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:05,996 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:06,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:06,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:06,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:38:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:06,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:06,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:06,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832420523] [2021-05-03 14:38:06,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:06,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:06,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:06,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:06,102 INFO L87 Difference]: Start difference. First operand 157 states and 341 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:06,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:06,594 INFO L93 Difference]: Finished difference Result 180 states and 388 transitions. [2021-05-03 14:38:06,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:38:06,595 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:06,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:06,596 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:38:06,596 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:38:06,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 605.8ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:38:06,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:38:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 155. [2021-05-03 14:38:06,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.188311688311688) internal successors, (337), 154 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:06,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 337 transitions. [2021-05-03 14:38:06,597 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 337 transitions. Word has length 19 [2021-05-03 14:38:06,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:06,597 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 337 transitions. [2021-05-03 14:38:06,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:06,597 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 337 transitions. [2021-05-03 14:38:06,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:06,598 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:06,598 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:06,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1722 [2021-05-03 14:38:06,798 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:06,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:06,798 INFO L82 PathProgramCache]: Analyzing trace with hash -621408950, now seen corresponding path program 343 times [2021-05-03 14:38:06,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:06,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114812953] [2021-05-03 14:38:06,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114812953] [2021-05-03 14:38:06,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832220669] [2021-05-03 14:38:06,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:07,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:07,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:07,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:07,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:07,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804992956] [2021-05-03 14:38:07,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:07,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:07,324 INFO L87 Difference]: Start difference. First operand 155 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:07,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:07,841 INFO L93 Difference]: Finished difference Result 193 states and 405 transitions. [2021-05-03 14:38:07,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:38:07,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:07,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:07,842 INFO L225 Difference]: With dead ends: 193 [2021-05-03 14:38:07,842 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 14:38:07,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 620.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:38:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 14:38:07,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2021-05-03 14:38:07,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1923076923076925) internal successors, (342), 156 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 342 transitions. [2021-05-03 14:38:07,844 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 342 transitions. Word has length 19 [2021-05-03 14:38:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:07,844 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 342 transitions. [2021-05-03 14:38:07,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 342 transitions. [2021-05-03 14:38:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:07,845 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:07,845 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:08,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1726,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:08,045 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1388776760, now seen corresponding path program 344 times [2021-05-03 14:38:08,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:08,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73842771] [2021-05-03 14:38:08,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:08,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:08,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73842771] [2021-05-03 14:38:08,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536351379] [2021-05-03 14:38:08,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:08,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:38:08,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:08,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:08,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:08,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:08,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:08,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:08,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:08,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:08,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:08,451 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:08,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:08,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:08,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:08,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:08,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:08,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:08,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:08,556 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-05-03 14:38:08,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:08,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:08,563 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:08,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:08,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:08,600 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:38:08,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:08,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:08,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:08,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550375829] [2021-05-03 14:38:08,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:08,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:08,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:08,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:08,698 INFO L87 Difference]: Start difference. First operand 157 states and 342 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:09,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:09,257 INFO L93 Difference]: Finished difference Result 235 states and 488 transitions. [2021-05-03 14:38:09,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:38:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:09,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:09,259 INFO L225 Difference]: With dead ends: 235 [2021-05-03 14:38:09,259 INFO L226 Difference]: Without dead ends: 235 [2021-05-03 14:38:09,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 583.9ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:09,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-03 14:38:09,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 158. [2021-05-03 14:38:09,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.210191082802548) internal successors, (347), 157 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 347 transitions. [2021-05-03 14:38:09,261 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 347 transitions. Word has length 19 [2021-05-03 14:38:09,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:09,261 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 347 transitions. [2021-05-03 14:38:09,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:09,261 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 347 transitions. [2021-05-03 14:38:09,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:09,261 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:09,261 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:09,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1738 [2021-05-03 14:38:09,462 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:09,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1494344204, now seen corresponding path program 345 times [2021-05-03 14:38:09,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:09,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362203457] [2021-05-03 14:38:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:09,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362203457] [2021-05-03 14:38:09,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436506413] [2021-05-03 14:38:09,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:09,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:38:09,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:09,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:09,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:09,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:09,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:09,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953050954] [2021-05-03 14:38:09,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:09,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:09,914 INFO L87 Difference]: Start difference. First operand 158 states and 347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:10,386 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 14:38:10,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:10,418 INFO L93 Difference]: Finished difference Result 168 states and 363 transitions. [2021-05-03 14:38:10,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:38:10,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:10,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:10,420 INFO L225 Difference]: With dead ends: 168 [2021-05-03 14:38:10,420 INFO L226 Difference]: Without dead ends: 164 [2021-05-03 14:38:10,420 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-03 14:38:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2021-05-03 14:38:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2038216560509554) internal successors, (346), 157 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 346 transitions. [2021-05-03 14:38:10,422 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 346 transitions. Word has length 19 [2021-05-03 14:38:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:10,422 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 346 transitions. [2021-05-03 14:38:10,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 346 transitions. [2021-05-03 14:38:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:10,422 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:10,422 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:10,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1741 [2021-05-03 14:38:10,623 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:10,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:10,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1407462970, now seen corresponding path program 346 times [2021-05-03 14:38:10,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:10,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361007031] [2021-05-03 14:38:10,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:10,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:10,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361007031] [2021-05-03 14:38:10,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309679591] [2021-05-03 14:38:10,788 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:10,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:10,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:10,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:10,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:11,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:11,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:11,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:11,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:11,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:11,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:11,080 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:38:11,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:11,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:11,086 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:11,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:11,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:11,098 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:38:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:11,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:11,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:11,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848091004] [2021-05-03 14:38:11,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:11,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:11,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:11,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:11,142 INFO L87 Difference]: Start difference. First operand 158 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:11,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:11,605 INFO L93 Difference]: Finished difference Result 190 states and 408 transitions. [2021-05-03 14:38:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:38:11,606 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:11,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:11,607 INFO L225 Difference]: With dead ends: 190 [2021-05-03 14:38:11,607 INFO L226 Difference]: Without dead ends: 190 [2021-05-03 14:38:11,607 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-03 14:38:11,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 152. [2021-05-03 14:38:11,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:11,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-05-03 14:38:11,608 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-05-03 14:38:11,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:11,608 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-05-03 14:38:11,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:11,608 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-05-03 14:38:11,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:11,609 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:11,609 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:11,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1745 [2021-05-03 14:38:11,809 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:11,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:11,809 INFO L82 PathProgramCache]: Analyzing trace with hash -43204718, now seen corresponding path program 347 times [2021-05-03 14:38:11,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:11,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073012597] [2021-05-03 14:38:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:11,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073012597] [2021-05-03 14:38:11,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457261072] [2021-05-03 14:38:11,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:12,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:38:12,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:12,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:12,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:12,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332934487] [2021-05-03 14:38:12,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:12,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:12,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:12,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:12,317 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:12,713 INFO L93 Difference]: Finished difference Result 191 states and 409 transitions. [2021-05-03 14:38:12,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:38:12,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:12,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:12,717 INFO L225 Difference]: With dead ends: 191 [2021-05-03 14:38:12,717 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:38:12,717 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 358.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:38:12,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 155. [2021-05-03 14:38:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.188311688311688) internal successors, (337), 154 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 337 transitions. [2021-05-03 14:38:12,719 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 337 transitions. Word has length 19 [2021-05-03 14:38:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:12,719 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 337 transitions. [2021-05-03 14:38:12,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:12,719 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 337 transitions. [2021-05-03 14:38:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:12,719 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:12,719 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:12,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1746,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:12,920 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:12,920 INFO L82 PathProgramCache]: Analyzing trace with hash -403121236, now seen corresponding path program 348 times [2021-05-03 14:38:12,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:12,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576575997] [2021-05-03 14:38:12,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:13,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576575997] [2021-05-03 14:38:13,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475972284] [2021-05-03 14:38:13,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:13,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:38:13,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:13,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:13,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:13,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:13,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188117450] [2021-05-03 14:38:13,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:13,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:13,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:13,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:13,473 INFO L87 Difference]: Start difference. First operand 155 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:14,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:14,006 INFO L93 Difference]: Finished difference Result 214 states and 456 transitions. [2021-05-03 14:38:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:38:14,007 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:14,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:14,008 INFO L225 Difference]: With dead ends: 214 [2021-05-03 14:38:14,008 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 14:38:14,008 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 438.4ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:38:14,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 14:38:14,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2021-05-03 14:38:14,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1870967741935483) internal successors, (339), 155 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 339 transitions. [2021-05-03 14:38:14,009 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 339 transitions. Word has length 19 [2021-05-03 14:38:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:14,009 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 339 transitions. [2021-05-03 14:38:14,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 339 transitions. [2021-05-03 14:38:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:14,010 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:14,010 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:14,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1750 [2021-05-03 14:38:14,210 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:14,211 INFO L82 PathProgramCache]: Analyzing trace with hash 306926534, now seen corresponding path program 349 times [2021-05-03 14:38:14,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:14,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324720580] [2021-05-03 14:38:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:14,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324720580] [2021-05-03 14:38:14,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161040083] [2021-05-03 14:38:14,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:14,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:14,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:14,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:38:14,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:14,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:14,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:14,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:14,780 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:38:14,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:38:14,786 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:14,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:14,815 INFO L518 ElimStorePlain]: Eliminatee v_prenex_318 vanished before elimination [2021-05-03 14:38:14,815 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:38:14,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:14,817 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:38:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:14,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:14,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:14,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695560862] [2021-05-03 14:38:14,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:14,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:14,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:14,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:14,879 INFO L87 Difference]: Start difference. First operand 156 states and 339 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:15,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:15,322 INFO L93 Difference]: Finished difference Result 176 states and 379 transitions. [2021-05-03 14:38:15,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:38:15,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:15,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:15,323 INFO L225 Difference]: With dead ends: 176 [2021-05-03 14:38:15,323 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:38:15,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 478.5ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:38:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 154. [2021-05-03 14:38:15,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.189542483660131) internal successors, (335), 153 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:15,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 335 transitions. [2021-05-03 14:38:15,325 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 335 transitions. Word has length 19 [2021-05-03 14:38:15,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:15,325 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 335 transitions. [2021-05-03 14:38:15,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:15,325 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 335 transitions. [2021-05-03 14:38:15,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:15,325 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:15,325 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:15,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1760 [2021-05-03 14:38:15,525 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:15,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1358924438, now seen corresponding path program 350 times [2021-05-03 14:38:15,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:15,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482714514] [2021-05-03 14:38:15,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:15,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:15,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482714514] [2021-05-03 14:38:15,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115210582] [2021-05-03 14:38:15,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:15,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:38:15,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:15,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:15,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:15,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:15,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:15,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:15,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:15,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:15,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:15,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:15,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:15,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:15,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:15,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:15,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:15,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:15,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:15,948 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:16,048 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:38:16,049 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-05-03 14:38:16,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:16,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:16,057 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:16,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:16,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:16,095 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:38:16,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:16,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:16,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:16,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116546545] [2021-05-03 14:38:16,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:16,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:16,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:16,173 INFO L87 Difference]: Start difference. First operand 154 states and 335 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:16,938 INFO L93 Difference]: Finished difference Result 205 states and 428 transitions. [2021-05-03 14:38:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:38:16,939 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:16,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:16,939 INFO L225 Difference]: With dead ends: 205 [2021-05-03 14:38:16,939 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 14:38:16,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 683.0ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:38:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 14:38:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 161. [2021-05-03 14:38:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-05-03 14:38:16,941 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-05-03 14:38:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:16,941 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-05-03 14:38:16,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:16,941 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-05-03 14:38:16,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:16,941 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:16,941 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:17,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1767,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:17,142 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:17,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:17,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1785061940, now seen corresponding path program 351 times [2021-05-03 14:38:17,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:17,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211547650] [2021-05-03 14:38:17,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:17,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211547650] [2021-05-03 14:38:17,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806265584] [2021-05-03 14:38:17,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:17,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:38:17,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:17,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:17,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:17,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:17,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:17,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294326623] [2021-05-03 14:38:17,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:17,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:17,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:17,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:17,678 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:18,334 INFO L93 Difference]: Finished difference Result 202 states and 426 transitions. [2021-05-03 14:38:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:38:18,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:18,335 INFO L225 Difference]: With dead ends: 202 [2021-05-03 14:38:18,335 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 14:38:18,335 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 682.1ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:38:18,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 14:38:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 161. [2021-05-03 14:38:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.2) internal successors, (352), 160 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 352 transitions. [2021-05-03 14:38:18,337 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 352 transitions. Word has length 19 [2021-05-03 14:38:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:18,337 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 352 transitions. [2021-05-03 14:38:18,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 352 transitions. [2021-05-03 14:38:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:18,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:18,338 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:18,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1771,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:18,538 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:18,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:18,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1799857586, now seen corresponding path program 352 times [2021-05-03 14:38:18,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:18,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567592531] [2021-05-03 14:38:18,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:18,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567592531] [2021-05-03 14:38:18,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72812715] [2021-05-03 14:38:18,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:18,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:18,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:18,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:18,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:19,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:19,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:38:19,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:19,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:19,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:19,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:38:19,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:19,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:19,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:19,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:38:19,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:19,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:19,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:19,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:19,114 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:38:19,115 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:38:19,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:19,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:38:19,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:19,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:19,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:19,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840399337] [2021-05-03 14:38:19,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:19,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:19,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:19,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:19,180 INFO L87 Difference]: Start difference. First operand 161 states and 352 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:19,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:19,870 INFO L93 Difference]: Finished difference Result 211 states and 442 transitions. [2021-05-03 14:38:19,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:38:19,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:19,872 INFO L225 Difference]: With dead ends: 211 [2021-05-03 14:38:19,872 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 14:38:19,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 626.9ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:19,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 14:38:19,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 160. [2021-05-03 14:38:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.20125786163522) internal successors, (350), 159 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 350 transitions. [2021-05-03 14:38:19,873 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 350 transitions. Word has length 19 [2021-05-03 14:38:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:19,873 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 350 transitions. [2021-05-03 14:38:19,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 350 transitions. [2021-05-03 14:38:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:19,874 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:19,874 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:20,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1781 [2021-05-03 14:38:20,074 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:20,075 INFO L82 PathProgramCache]: Analyzing trace with hash 262057716, now seen corresponding path program 353 times [2021-05-03 14:38:20,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:20,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228633287] [2021-05-03 14:38:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:20,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228633287] [2021-05-03 14:38:20,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249153247] [2021-05-03 14:38:20,254 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:20,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:38:20,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:20,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:20,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:20,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:20,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:20,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018339673] [2021-05-03 14:38:20,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:20,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:20,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:20,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:20,540 INFO L87 Difference]: Start difference. First operand 160 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:20,996 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 26 [2021-05-03 14:38:21,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:21,025 INFO L93 Difference]: Finished difference Result 169 states and 364 transitions. [2021-05-03 14:38:21,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:38:21,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:21,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:21,027 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:38:21,027 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:38:21,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 634.5ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:21,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:38:21,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2021-05-03 14:38:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.1949685534591197) internal successors, (349), 159 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 349 transitions. [2021-05-03 14:38:21,029 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 349 transitions. Word has length 19 [2021-05-03 14:38:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:21,029 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 349 transitions. [2021-05-03 14:38:21,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 349 transitions. [2021-05-03 14:38:21,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:21,029 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:21,029 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:21,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1791,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:21,229 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:21,230 INFO L82 PathProgramCache]: Analyzing trace with hash 348938950, now seen corresponding path program 354 times [2021-05-03 14:38:21,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:21,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942438789] [2021-05-03 14:38:21,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:21,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942438789] [2021-05-03 14:38:21,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769258199] [2021-05-03 14:38:21,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:21,408 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:38:21,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:21,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:21,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:21,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:21,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:21,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:21,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:21,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:21,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:21,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:21,681 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:38:21,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:21,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:21,689 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:21,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:21,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:21,702 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:38:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:21,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:21,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:21,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483456577] [2021-05-03 14:38:21,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:21,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:21,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:21,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:21,751 INFO L87 Difference]: Start difference. First operand 160 states and 349 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:22,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:22,240 INFO L93 Difference]: Finished difference Result 187 states and 402 transitions. [2021-05-03 14:38:22,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:38:22,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:22,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:22,242 INFO L225 Difference]: With dead ends: 187 [2021-05-03 14:38:22,242 INFO L226 Difference]: Without dead ends: 187 [2021-05-03 14:38:22,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 491.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:38:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-03 14:38:22,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 153. [2021-05-03 14:38:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1907894736842106) internal successors, (333), 152 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 333 transitions. [2021-05-03 14:38:22,244 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 333 transitions. Word has length 19 [2021-05-03 14:38:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:22,244 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 333 transitions. [2021-05-03 14:38:22,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 333 transitions. [2021-05-03 14:38:22,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:22,245 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:22,245 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:22,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1795 [2021-05-03 14:38:22,453 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash 899263660, now seen corresponding path program 355 times [2021-05-03 14:38:22,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:22,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413578895] [2021-05-03 14:38:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:22,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413578895] [2021-05-03 14:38:22,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824275811] [2021-05-03 14:38:22,658 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:22,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:23,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:23,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:23,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598936398] [2021-05-03 14:38:23,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:23,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:23,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:23,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:23,054 INFO L87 Difference]: Start difference. First operand 153 states and 333 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:24,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:24,021 INFO L93 Difference]: Finished difference Result 199 states and 419 transitions. [2021-05-03 14:38:24,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:38:24,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:24,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:24,023 INFO L225 Difference]: With dead ends: 199 [2021-05-03 14:38:24,023 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 14:38:24,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 918.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:38:24,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 14:38:24,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 156. [2021-05-03 14:38:24,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2) internal successors, (341), 155 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 341 transitions. [2021-05-03 14:38:24,025 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 341 transitions. Word has length 19 [2021-05-03 14:38:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:24,025 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 341 transitions. [2021-05-03 14:38:24,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 341 transitions. [2021-05-03 14:38:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:24,025 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:24,025 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:24,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1796 [2021-05-03 14:38:24,226 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:24,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:24,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1609311430, now seen corresponding path program 356 times [2021-05-03 14:38:24,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:24,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561423432] [2021-05-03 14:38:24,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:24,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561423432] [2021-05-03 14:38:24,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909123081] [2021-05-03 14:38:24,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:24,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:38:24,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:24,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:24,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:24,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:24,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:24,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:24,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:24,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:24,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:24,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:24,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:24,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:24,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:24,697 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:24,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:24,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:24,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:24,804 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-05-03 14:38:24,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:24,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:24,812 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:24,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:24,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:24,849 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:38:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:24,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:24,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:24,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776926450] [2021-05-03 14:38:24,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:24,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:24,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:24,956 INFO L87 Difference]: Start difference. First operand 156 states and 341 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:25,972 INFO L93 Difference]: Finished difference Result 242 states and 501 transitions. [2021-05-03 14:38:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:38:25,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:25,973 INFO L225 Difference]: With dead ends: 242 [2021-05-03 14:38:25,973 INFO L226 Difference]: Without dead ends: 242 [2021-05-03 14:38:25,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1029.3ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:38:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-03 14:38:25,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 158. [2021-05-03 14:38:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2229299363057327) internal successors, (349), 157 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:25,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 349 transitions. [2021-05-03 14:38:25,975 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 349 transitions. Word has length 19 [2021-05-03 14:38:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:25,975 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 349 transitions. [2021-05-03 14:38:25,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 349 transitions. [2021-05-03 14:38:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:25,976 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:25,976 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:26,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1806,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:26,176 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:26,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:26,176 INFO L82 PathProgramCache]: Analyzing trace with hash -623740564, now seen corresponding path program 357 times [2021-05-03 14:38:26,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:26,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156193583] [2021-05-03 14:38:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:26,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:26,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156193583] [2021-05-03 14:38:26,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156211735] [2021-05-03 14:38:26,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:26,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:38:26,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:26,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:26,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:26,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:26,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:26,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547526497] [2021-05-03 14:38:26,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:26,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:26,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:26,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:26,720 INFO L87 Difference]: Start difference. First operand 158 states and 349 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:27,634 INFO L93 Difference]: Finished difference Result 169 states and 365 transitions. [2021-05-03 14:38:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:38:27,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:27,636 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:38:27,636 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:38:27,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 929.6ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:38:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2021-05-03 14:38:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.21656050955414) internal successors, (348), 157 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 348 transitions. [2021-05-03 14:38:27,637 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 348 transitions. Word has length 19 [2021-05-03 14:38:27,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:27,637 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 348 transitions. [2021-05-03 14:38:27,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:27,637 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 348 transitions. [2021-05-03 14:38:27,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:27,638 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:27,638 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:27,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1809 [2021-05-03 14:38:27,838 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:27,839 INFO L82 PathProgramCache]: Analyzing trace with hash -536859330, now seen corresponding path program 358 times [2021-05-03 14:38:27,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:27,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312853332] [2021-05-03 14:38:27,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:27,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:28,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:28,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312853332] [2021-05-03 14:38:28,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303202428] [2021-05-03 14:38:28,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:28,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:28,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:28,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:28,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:28,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:28,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:28,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:28,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:28,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:28,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:28,389 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:38:28,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:28,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:28,397 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:28,410 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:28,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:28,412 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:38:28,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:28,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:28,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:28,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286082971] [2021-05-03 14:38:28,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:28,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:28,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:28,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:28,463 INFO L87 Difference]: Start difference. First operand 158 states and 348 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:29,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:29,266 INFO L93 Difference]: Finished difference Result 196 states and 420 transitions. [2021-05-03 14:38:29,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:38:29,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:29,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:29,268 INFO L225 Difference]: With dead ends: 196 [2021-05-03 14:38:29,268 INFO L226 Difference]: Without dead ends: 196 [2021-05-03 14:38:29,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 934.5ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:38:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-03 14:38:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2021-05-03 14:38:29,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.217948717948718) internal successors, (346), 156 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 346 transitions. [2021-05-03 14:38:29,270 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 346 transitions. Word has length 19 [2021-05-03 14:38:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:29,270 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 346 transitions. [2021-05-03 14:38:29,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 346 transitions. [2021-05-03 14:38:29,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:29,271 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:29,271 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:29,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1813 [2021-05-03 14:38:29,471 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:29,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:29,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1130086830, now seen corresponding path program 359 times [2021-05-03 14:38:29,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:29,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062541736] [2021-05-03 14:38:29,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:29,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:29,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062541736] [2021-05-03 14:38:29,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841766249] [2021-05-03 14:38:29,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:29,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:38:29,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:29,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:29,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:29,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:29,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:29,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146867629] [2021-05-03 14:38:29,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:29,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:29,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:29,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:29,939 INFO L87 Difference]: Start difference. First operand 157 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:30,386 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2021-05-03 14:38:30,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:30,431 INFO L93 Difference]: Finished difference Result 166 states and 359 transitions. [2021-05-03 14:38:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:38:30,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:30,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:30,433 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:38:30,433 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:38:30,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 646.1ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:30,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:38:30,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2021-05-03 14:38:30,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2115384615384617) internal successors, (345), 156 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:30,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 345 transitions. [2021-05-03 14:38:30,435 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 345 transitions. Word has length 19 [2021-05-03 14:38:30,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:30,435 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 345 transitions. [2021-05-03 14:38:30,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:30,435 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 345 transitions. [2021-05-03 14:38:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:30,435 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:30,435 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:30,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1814,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:30,636 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:30,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1651323846, now seen corresponding path program 360 times [2021-05-03 14:38:30,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:30,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508232874] [2021-05-03 14:38:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:30,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508232874] [2021-05-03 14:38:30,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042962516] [2021-05-03 14:38:30,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:30,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:38:30,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:30,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:30,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:31,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:31,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:31,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:31,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:31,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:31,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:31,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:31,139 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:38:31,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:31,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:31,144 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:31,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:31,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:31,155 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:38:31,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:31,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:31,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:31,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678758341] [2021-05-03 14:38:31,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:31,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:31,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:31,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:31,191 INFO L87 Difference]: Start difference. First operand 157 states and 345 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:31,559 INFO L93 Difference]: Finished difference Result 187 states and 401 transitions. [2021-05-03 14:38:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:38:31,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:31,561 INFO L225 Difference]: With dead ends: 187 [2021-05-03 14:38:31,561 INFO L226 Difference]: Without dead ends: 187 [2021-05-03 14:38:31,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:31,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-03 14:38:31,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 152. [2021-05-03 14:38:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-05-03 14:38:31,563 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-05-03 14:38:31,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:31,563 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-05-03 14:38:31,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:31,563 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-05-03 14:38:31,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:31,563 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:31,563 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:31,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1818,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:31,763 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:31,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:31,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1440748214, now seen corresponding path program 361 times [2021-05-03 14:38:31,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:31,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435806319] [2021-05-03 14:38:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:32,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435806319] [2021-05-03 14:38:32,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632669158] [2021-05-03 14:38:32,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:32,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:32,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:32,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:32,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:32,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:32,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543709347] [2021-05-03 14:38:32,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:32,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:32,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:32,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:32,414 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:33,160 INFO L93 Difference]: Finished difference Result 196 states and 411 transitions. [2021-05-03 14:38:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:38:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:33,162 INFO L225 Difference]: With dead ends: 196 [2021-05-03 14:38:33,162 INFO L226 Difference]: Without dead ends: 196 [2021-05-03 14:38:33,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 887.2ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:38:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-03 14:38:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 156. [2021-05-03 14:38:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.206451612903226) internal successors, (342), 155 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 342 transitions. [2021-05-03 14:38:33,164 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 342 transitions. Word has length 19 [2021-05-03 14:38:33,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:33,164 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 342 transitions. [2021-05-03 14:38:33,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:33,164 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 342 transitions. [2021-05-03 14:38:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:33,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:33,164 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:33,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1819 [2021-05-03 14:38:33,365 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:33,365 INFO L82 PathProgramCache]: Analyzing trace with hash -80631474, now seen corresponding path program 362 times [2021-05-03 14:38:33,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:33,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164853400] [2021-05-03 14:38:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:33,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164853400] [2021-05-03 14:38:33,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701286128] [2021-05-03 14:38:33,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:33,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:38:33,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:33,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:33,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:33,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:33,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:33,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:33,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:33,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:33,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:33,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:33,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:33,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:33,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:33,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:33,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:33,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:33,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:33,905 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:34,014 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:38:34,015 INFO L628 ElimStorePlain]: treesize reduction 69, result has 38.9 percent of original size [2021-05-03 14:38:34,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:34,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:34,023 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:34,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:34,062 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:34,062 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:38:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:34,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:34,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:34,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339170987] [2021-05-03 14:38:34,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:34,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:34,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:34,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:34,175 INFO L87 Difference]: Start difference. First operand 156 states and 342 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:35,676 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 14:38:35,829 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 14:38:35,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:35,873 INFO L93 Difference]: Finished difference Result 235 states and 487 transitions. [2021-05-03 14:38:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:38:35,874 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:35,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:35,875 INFO L225 Difference]: With dead ends: 235 [2021-05-03 14:38:35,875 INFO L226 Difference]: Without dead ends: 235 [2021-05-03 14:38:35,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1459.2ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:38:35,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-03 14:38:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 159. [2021-05-03 14:38:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2341772151898733) internal successors, (353), 158 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 353 transitions. [2021-05-03 14:38:35,876 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 353 transitions. Word has length 19 [2021-05-03 14:38:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:35,877 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 353 transitions. [2021-05-03 14:38:35,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:35,877 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 353 transitions. [2021-05-03 14:38:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:35,877 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:35,877 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:36,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1829,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:36,077 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:36,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:36,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1981283828, now seen corresponding path program 363 times [2021-05-03 14:38:36,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:36,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41266782] [2021-05-03 14:38:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41266782] [2021-05-03 14:38:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685662797] [2021-05-03 14:38:36,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:36,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:38:36,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:36,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:36,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:36,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:36,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:36,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464632425] [2021-05-03 14:38:36,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:36,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:36,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:36,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:36,682 INFO L87 Difference]: Start difference. First operand 159 states and 353 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:37,142 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 14:38:37,322 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 14:38:37,516 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:38:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:37,729 INFO L93 Difference]: Finished difference Result 173 states and 374 transitions. [2021-05-03 14:38:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:38:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:37,731 INFO L225 Difference]: With dead ends: 173 [2021-05-03 14:38:37,731 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:38:37,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1190.8ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:38:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:38:37,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2021-05-03 14:38:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.2278481012658227) internal successors, (352), 158 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 352 transitions. [2021-05-03 14:38:37,732 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 352 transitions. Word has length 19 [2021-05-03 14:38:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:37,732 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 352 transitions. [2021-05-03 14:38:37,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 352 transitions. [2021-05-03 14:38:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:37,733 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:37,733 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:37,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1832 [2021-05-03 14:38:37,933 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:37,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:37,933 INFO L82 PathProgramCache]: Analyzing trace with hash 2068165062, now seen corresponding path program 364 times [2021-05-03 14:38:37,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:37,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409600744] [2021-05-03 14:38:37,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:38,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409600744] [2021-05-03 14:38:38,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155185844] [2021-05-03 14:38:38,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:38,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:38,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:38,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:38,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:38,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:38,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:38,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:38,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:38,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:38,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:38,539 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:38:38,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:38,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:38,548 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:38,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:38,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:38,561 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:38:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:38,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:38,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:38,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392251005] [2021-05-03 14:38:38,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:38,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:38,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:38,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:38,616 INFO L87 Difference]: Start difference. First operand 159 states and 352 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:39,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:39,600 INFO L93 Difference]: Finished difference Result 204 states and 436 transitions. [2021-05-03 14:38:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:38:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:39,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:39,601 INFO L225 Difference]: With dead ends: 204 [2021-05-03 14:38:39,602 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 14:38:39,602 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:38:39,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 14:38:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 158. [2021-05-03 14:38:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.229299363057325) internal successors, (350), 157 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 350 transitions. [2021-05-03 14:38:39,603 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 350 transitions. Word has length 19 [2021-05-03 14:38:39,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:39,603 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 350 transitions. [2021-05-03 14:38:39,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 350 transitions. [2021-05-03 14:38:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:39,604 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:39,604 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:39,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1836,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:39,804 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:39,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1474937562, now seen corresponding path program 365 times [2021-05-03 14:38:39,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:39,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271694726] [2021-05-03 14:38:39,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:40,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271694726] [2021-05-03 14:38:40,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627947803] [2021-05-03 14:38:40,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:40,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:38:40,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:40,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:40,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:40,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:40,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:40,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839549104] [2021-05-03 14:38:40,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:40,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:40,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:40,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:40,376 INFO L87 Difference]: Start difference. First operand 158 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:40,731 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 14:38:40,883 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 14:38:41,074 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-05-03 14:38:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:41,121 INFO L93 Difference]: Finished difference Result 171 states and 369 transitions. [2021-05-03 14:38:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:38:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:41,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:41,123 INFO L225 Difference]: With dead ends: 171 [2021-05-03 14:38:41,123 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:38:41,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 923.3ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:38:41,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:38:41,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 158. [2021-05-03 14:38:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.2229299363057327) internal successors, (349), 157 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 349 transitions. [2021-05-03 14:38:41,125 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 349 transitions. Word has length 19 [2021-05-03 14:38:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:41,125 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 349 transitions. [2021-05-03 14:38:41,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 349 transitions. [2021-05-03 14:38:41,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:41,125 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:41,125 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:41,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1837 [2021-05-03 14:38:41,347 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:41,347 INFO L82 PathProgramCache]: Analyzing trace with hash -38619058, now seen corresponding path program 366 times [2021-05-03 14:38:41,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:41,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411229742] [2021-05-03 14:38:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:41,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411229742] [2021-05-03 14:38:41,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766607923] [2021-05-03 14:38:41,529 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:41,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:38:41,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:41,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:41,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:41,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:41,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:41,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:41,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:41,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:41,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:41,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:41,892 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:38:41,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:41,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:41,900 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:41,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:41,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:41,914 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:38:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:41,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:41,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:41,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255315399] [2021-05-03 14:38:41,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:41,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:41,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:41,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:41,966 INFO L87 Difference]: Start difference. First operand 158 states and 349 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:42,800 INFO L93 Difference]: Finished difference Result 197 states and 423 transitions. [2021-05-03 14:38:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:38:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:42,801 INFO L225 Difference]: With dead ends: 197 [2021-05-03 14:38:42,802 INFO L226 Difference]: Without dead ends: 197 [2021-05-03 14:38:42,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 871.2ms TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:38:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-03 14:38:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2021-05-03 14:38:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.2243589743589745) internal successors, (347), 156 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 347 transitions. [2021-05-03 14:38:42,803 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 347 transitions. Word has length 19 [2021-05-03 14:38:42,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:42,803 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 347 transitions. [2021-05-03 14:38:42,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:42,803 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 347 transitions. [2021-05-03 14:38:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:42,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:42,804 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:43,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1841,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:43,004 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:43,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1336894796, now seen corresponding path program 367 times [2021-05-03 14:38:43,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:43,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209637381] [2021-05-03 14:38:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:43,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209637381] [2021-05-03 14:38:43,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226557749] [2021-05-03 14:38:43,214 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:43,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:43,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:43,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:43,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:43,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998827745] [2021-05-03 14:38:43,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:43,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:43,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:43,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:43,566 INFO L87 Difference]: Start difference. First operand 157 states and 347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:43,879 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 14:38:44,090 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-05-03 14:38:44,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:44,229 INFO L93 Difference]: Finished difference Result 168 states and 363 transitions. [2021-05-03 14:38:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:38:44,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:44,230 INFO L225 Difference]: With dead ends: 168 [2021-05-03 14:38:44,230 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:38:44,230 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 788.4ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:38:44,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:38:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2021-05-03 14:38:44,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.217948717948718) internal successors, (346), 156 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 346 transitions. [2021-05-03 14:38:44,231 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 346 transitions. Word has length 19 [2021-05-03 14:38:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:44,232 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 346 transitions. [2021-05-03 14:38:44,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 346 transitions. [2021-05-03 14:38:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:44,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:44,232 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:44,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1842 [2021-05-03 14:38:44,432 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash -924417338, now seen corresponding path program 368 times [2021-05-03 14:38:44,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:44,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136035860] [2021-05-03 14:38:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:44,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136035860] [2021-05-03 14:38:44,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269675691] [2021-05-03 14:38:44,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:44,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:38:44,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:44,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:44,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:44,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:44,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:44,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:44,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:44,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:44,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:44,978 INFO L628 ElimStorePlain]: treesize reduction 30, result has 43.4 percent of original size [2021-05-03 14:38:44,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:44,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:44,986 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:44,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:45,000 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:45,000 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:38:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:45,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:45,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:45,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965574013] [2021-05-03 14:38:45,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:45,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:45,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:45,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:45,058 INFO L87 Difference]: Start difference. First operand 157 states and 346 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:45,343 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2021-05-03 14:38:45,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:38:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:45,345 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:38:45,345 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:38:45,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:45,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:38:45,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2021-05-03 14:38:45,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.196078431372549) internal successors, (336), 153 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:45,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 336 transitions. [2021-05-03 14:38:45,346 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 336 transitions. Word has length 19 [2021-05-03 14:38:45,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:45,346 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 336 transitions. [2021-05-03 14:38:45,347 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:45,347 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 336 transitions. [2021-05-03 14:38:45,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:45,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:45,347 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:45,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1846,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:45,547 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:45,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:45,548 INFO L82 PathProgramCache]: Analyzing trace with hash -2089052390, now seen corresponding path program 369 times [2021-05-03 14:38:45,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:45,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300813216] [2021-05-03 14:38:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:45,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300813216] [2021-05-03 14:38:45,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952910208] [2021-05-03 14:38:45,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:45,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:38:45,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:45,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:46,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:46,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:46,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:38:46,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:46,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:46,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:38:46,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:46,127 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:38:46,127 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:38:46,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:46,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:38:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:46,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:46,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:46,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936659305] [2021-05-03 14:38:46,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:46,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:46,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:46,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:46,166 INFO L87 Difference]: Start difference. First operand 154 states and 336 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:46,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:46,474 INFO L93 Difference]: Finished difference Result 170 states and 368 transitions. [2021-05-03 14:38:46,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:38:46,476 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:46,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:46,476 INFO L225 Difference]: With dead ends: 170 [2021-05-03 14:38:46,476 INFO L226 Difference]: Without dead ends: 170 [2021-05-03 14:38:46,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 426.7ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:46,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-03 14:38:46,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2021-05-03 14:38:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.196078431372549) internal successors, (336), 153 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 336 transitions. [2021-05-03 14:38:46,478 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 336 transitions. Word has length 19 [2021-05-03 14:38:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:46,478 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 336 transitions. [2021-05-03 14:38:46,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 336 transitions. [2021-05-03 14:38:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:46,478 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:46,478 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:46,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1847,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:46,679 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1572721514, now seen corresponding path program 370 times [2021-05-03 14:38:46,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:46,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76383064] [2021-05-03 14:38:46,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:46,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76383064] [2021-05-03 14:38:46,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597155108] [2021-05-03 14:38:46,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:46,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:46,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:46,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:46,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:47,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:47,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:47,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909224029] [2021-05-03 14:38:47,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:47,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:47,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:47,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:47,247 INFO L87 Difference]: Start difference. First operand 154 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:47,639 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 14:38:47,850 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 14:38:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:48,077 INFO L93 Difference]: Finished difference Result 163 states and 348 transitions. [2021-05-03 14:38:48,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:38:48,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:48,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:48,079 INFO L225 Difference]: With dead ends: 163 [2021-05-03 14:38:48,079 INFO L226 Difference]: Without dead ends: 154 [2021-05-03 14:38:48,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 871.1ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:38:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-03 14:38:48,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-05-03 14:38:48,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1907894736842106) internal successors, (333), 152 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 333 transitions. [2021-05-03 14:38:48,081 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 333 transitions. Word has length 19 [2021-05-03 14:38:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:48,081 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 333 transitions. [2021-05-03 14:38:48,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 333 transitions. [2021-05-03 14:38:48,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:48,082 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:48,082 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:48,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1851 [2021-05-03 14:38:48,304 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:48,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2022497462, now seen corresponding path program 371 times [2021-05-03 14:38:48,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:48,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446166111] [2021-05-03 14:38:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446166111] [2021-05-03 14:38:48,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853690400] [2021-05-03 14:38:48,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:48,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:38:48,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:48,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:48,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:48,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:48,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:48,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:38:48,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:48,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:48,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:38:48,880 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:48,910 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:38:48,910 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:38:48,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:48,912 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:38:48,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:48,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:48,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:48,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103009828] [2021-05-03 14:38:48,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:48,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:48,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:48,924 INFO L87 Difference]: Start difference. First operand 153 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:49,637 INFO L93 Difference]: Finished difference Result 191 states and 409 transitions. [2021-05-03 14:38:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:38:49,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:49,639 INFO L225 Difference]: With dead ends: 191 [2021-05-03 14:38:49,639 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:38:49,640 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 845.5ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:38:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:38:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 154. [2021-05-03 14:38:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.189542483660131) internal successors, (335), 153 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 335 transitions. [2021-05-03 14:38:49,641 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 335 transitions. Word has length 19 [2021-05-03 14:38:49,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:49,641 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 335 transitions. [2021-05-03 14:38:49,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:49,641 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 335 transitions. [2021-05-03 14:38:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:49,642 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:49,642 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:49,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1855,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:49,842 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:49,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1027690778, now seen corresponding path program 372 times [2021-05-03 14:38:49,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:49,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731959938] [2021-05-03 14:38:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:50,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731959938] [2021-05-03 14:38:50,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614025329] [2021-05-03 14:38:50,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:50,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:38:50,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:50,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:50,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:50,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:50,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:50,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:38:50,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:50,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:50,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:38:50,440 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:50,475 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:38:50,475 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:38:50,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:50,476 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:38:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:50,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:50,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:50,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679097207] [2021-05-03 14:38:50,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:50,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:50,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:50,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:50,491 INFO L87 Difference]: Start difference. First operand 154 states and 335 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:51,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:51,541 INFO L93 Difference]: Finished difference Result 201 states and 427 transitions. [2021-05-03 14:38:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:38:51,542 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:51,543 INFO L225 Difference]: With dead ends: 201 [2021-05-03 14:38:51,543 INFO L226 Difference]: Without dead ends: 201 [2021-05-03 14:38:51,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1061.7ms TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:38:51,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-03 14:38:51,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 155. [2021-05-03 14:38:51,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.188311688311688) internal successors, (337), 154 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 337 transitions. [2021-05-03 14:38:51,544 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 337 transitions. Word has length 19 [2021-05-03 14:38:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:51,544 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 337 transitions. [2021-05-03 14:38:51,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 337 transitions. [2021-05-03 14:38:51,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:51,545 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:51,545 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:51,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1859,373 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:51,745 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:51,745 INFO L82 PathProgramCache]: Analyzing trace with hash 667774260, now seen corresponding path program 373 times [2021-05-03 14:38:51,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:51,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333492489] [2021-05-03 14:38:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:51,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333492489] [2021-05-03 14:38:51,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756301645] [2021-05-03 14:38:51,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:51,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:51,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:52,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:52,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:52,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:52,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:52,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:52,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:52,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:52,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:52,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:52,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:52,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:52,240 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:52,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:52,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:52,246 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:52,354 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 14:38:52,355 INFO L628 ElimStorePlain]: treesize reduction 75, result has 38.0 percent of original size [2021-05-03 14:38:52,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:52,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:38:52,364 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:52,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:52,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:52,406 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:38:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:52,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:52,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:52,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527315224] [2021-05-03 14:38:52,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:52,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:52,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:52,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:52,515 INFO L87 Difference]: Start difference. First operand 155 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:52,908 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2021-05-03 14:38:53,181 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-05-03 14:38:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:53,938 INFO L93 Difference]: Finished difference Result 204 states and 433 transitions. [2021-05-03 14:38:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:38:53,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:53,940 INFO L225 Difference]: With dead ends: 204 [2021-05-03 14:38:53,940 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 14:38:53,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1371.7ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:38:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 14:38:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 156. [2021-05-03 14:38:53,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1870967741935483) internal successors, (339), 155 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 339 transitions. [2021-05-03 14:38:53,941 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 339 transitions. Word has length 19 [2021-05-03 14:38:53,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:53,941 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 339 transitions. [2021-05-03 14:38:53,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 339 transitions. [2021-05-03 14:38:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:53,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:53,942 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:54,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1863 [2021-05-03 14:38:54,142 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:54,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:54,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1377822030, now seen corresponding path program 374 times [2021-05-03 14:38:54,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:54,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17340732] [2021-05-03 14:38:54,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:54,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17340732] [2021-05-03 14:38:54,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097063968] [2021-05-03 14:38:54,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:54,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:38:54,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:54,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:54,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:54,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:54,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:54,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:54,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:54,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:54,765 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:54,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:54,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:54,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:54,774 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:54,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:54,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:38:54,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:54,907 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 14:38:54,908 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-05-03 14:38:54,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:54,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:38:54,916 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:38:54,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:38:54,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:38:54,955 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-05-03 14:38:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:55,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:55,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:55,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137262169] [2021-05-03 14:38:55,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:55,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:55,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:55,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:55,069 INFO L87 Difference]: Start difference. First operand 156 states and 339 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:55,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:55,624 INFO L93 Difference]: Finished difference Result 169 states and 366 transitions. [2021-05-03 14:38:55,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:38:55,626 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:55,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:55,626 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:38:55,626 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:38:55,626 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 736.5ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:55,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:38:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-05-03 14:38:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.19205298013245) internal successors, (331), 151 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 331 transitions. [2021-05-03 14:38:55,628 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 331 transitions. Word has length 19 [2021-05-03 14:38:55,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:55,628 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 331 transitions. [2021-05-03 14:38:55,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:55,628 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 331 transitions. [2021-05-03 14:38:55,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:55,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:55,628 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:55,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1866,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:55,829 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:55,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:55,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1032302878, now seen corresponding path program 375 times [2021-05-03 14:38:55,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:55,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492862988] [2021-05-03 14:38:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:56,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492862988] [2021-05-03 14:38:56,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856485634] [2021-05-03 14:38:56,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:56,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:38:56,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:56,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:56,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:56,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:56,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:56,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857338955] [2021-05-03 14:38:56,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:56,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:56,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:56,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:56,360 INFO L87 Difference]: Start difference. First operand 152 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:56,782 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 14:38:56,957 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2021-05-03 14:38:57,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:57,030 INFO L93 Difference]: Finished difference Result 161 states and 343 transitions. [2021-05-03 14:38:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:38:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:57,033 INFO L225 Difference]: With dead ends: 161 [2021-05-03 14:38:57,033 INFO L226 Difference]: Without dead ends: 152 [2021-05-03 14:38:57,033 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 775.6ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:57,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-03 14:38:57,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-05-03 14:38:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.185430463576159) internal successors, (330), 151 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 330 transitions. [2021-05-03 14:38:57,034 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 330 transitions. Word has length 19 [2021-05-03 14:38:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:57,034 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 330 transitions. [2021-05-03 14:38:57,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:57,034 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 330 transitions. [2021-05-03 14:38:57,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:57,035 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:57,035 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:57,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1870 [2021-05-03 14:38:57,235 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:57,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:57,235 INFO L82 PathProgramCache]: Analyzing trace with hash 582526930, now seen corresponding path program 376 times [2021-05-03 14:38:57,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:57,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411436910] [2021-05-03 14:38:57,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:57,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:57,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:57,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411436910] [2021-05-03 14:38:57,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557440303] [2021-05-03 14:38:57,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:57,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:38:57,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:38:57,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:57,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:57,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:57,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:57,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:57,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:57,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:38:57,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:57,817 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-05-03 14:38:57,817 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:38:57,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:57,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:38:57,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:57,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:57,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:38:57,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5710210] [2021-05-03 14:38:57,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:38:57,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:57,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:38:57,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:38:57,863 INFO L87 Difference]: Start difference. First operand 152 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:38:58,406 INFO L93 Difference]: Finished difference Result 179 states and 384 transitions. [2021-05-03 14:38:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:38:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:38:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:38:58,408 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:38:58,408 INFO L226 Difference]: Without dead ends: 179 [2021-05-03 14:38:58,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 534.8ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:38:58,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-03 14:38:58,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 152. [2021-05-03 14:38:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.185430463576159) internal successors, (330), 151 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:58,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 330 transitions. [2021-05-03 14:38:58,410 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 330 transitions. Word has length 19 [2021-05-03 14:38:58,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:38:58,410 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 330 transitions. [2021-05-03 14:38:58,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:38:58,410 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 330 transitions. [2021-05-03 14:38:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:38:58,411 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:38:58,411 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:38:58,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1874 [2021-05-03 14:38:58,611 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:38:58,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:38:58,611 INFO L82 PathProgramCache]: Analyzing trace with hash -662252126, now seen corresponding path program 377 times [2021-05-03 14:38:58,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:38:58,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659717341] [2021-05-03 14:38:58,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:38:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:38:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:58,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659717341] [2021-05-03 14:38:58,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606340523] [2021-05-03 14:38:58,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:38:58,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:38:58,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:38:58,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:38:58,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:38:59,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:59,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:59,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:38:59,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:59,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:38:59,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:38:59,109 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:38:59,148 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:38:59,148 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:38:59,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:38:59,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:38:59,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:38:59,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:38:59,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:38:59,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122921038] [2021-05-03 14:38:59,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:38:59,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:38:59,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:38:59,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:38:59,164 INFO L87 Difference]: Start difference. First operand 152 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:00,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:00,225 INFO L93 Difference]: Finished difference Result 194 states and 414 transitions. [2021-05-03 14:39:00,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:00,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:00,227 INFO L225 Difference]: With dead ends: 194 [2021-05-03 14:39:00,227 INFO L226 Difference]: Without dead ends: 194 [2021-05-03 14:39:00,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 997.0ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:39:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-03 14:39:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 152. [2021-05-03 14:39:00,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.185430463576159) internal successors, (330), 151 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 330 transitions. [2021-05-03 14:39:00,228 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 330 transitions. Word has length 19 [2021-05-03 14:39:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:00,228 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 330 transitions. [2021-05-03 14:39:00,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 330 transitions. [2021-05-03 14:39:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:00,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:00,229 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:00,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1875 [2021-05-03 14:39:00,433 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:00,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:00,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1672237614, now seen corresponding path program 378 times [2021-05-03 14:39:00,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:00,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294611318] [2021-05-03 14:39:00,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:00,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294611318] [2021-05-03 14:39:00,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528314131] [2021-05-03 14:39:00,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:00,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:39:00,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:00,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:00,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:00,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:00,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:00,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:00,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:00,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:00,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:00,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:00,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:00,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:00,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:00,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:00,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:00,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:00,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:00,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:01,068 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-05-03 14:39:01,069 INFO L628 ElimStorePlain]: treesize reduction 79, result has 32.5 percent of original size [2021-05-03 14:39:01,069 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:01,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:01,071 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:39:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:01,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:01,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:01,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543185746] [2021-05-03 14:39:01,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:01,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:01,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:01,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:01,191 INFO L87 Difference]: Start difference. First operand 152 states and 330 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:02,343 INFO L93 Difference]: Finished difference Result 201 states and 428 transitions. [2021-05-03 14:39:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:39:02,345 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:02,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:02,349 INFO L225 Difference]: With dead ends: 201 [2021-05-03 14:39:02,349 INFO L226 Difference]: Without dead ends: 201 [2021-05-03 14:39:02,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1127.7ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:39:02,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-03 14:39:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 152. [2021-05-03 14:39:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.185430463576159) internal successors, (330), 151 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 330 transitions. [2021-05-03 14:39:02,352 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 330 transitions. Word has length 19 [2021-05-03 14:39:02,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:02,352 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 330 transitions. [2021-05-03 14:39:02,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:02,352 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 330 transitions. [2021-05-03 14:39:02,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:02,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:02,352 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:02,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1879,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:02,561 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:02,561 INFO L82 PathProgramCache]: Analyzing trace with hash 337948096, now seen corresponding path program 379 times [2021-05-03 14:39:02,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:02,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266227509] [2021-05-03 14:39:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:02,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266227509] [2021-05-03 14:39:02,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439262546] [2021-05-03 14:39:02,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:02,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:02,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:03,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:03,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:03,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426655536] [2021-05-03 14:39:03,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:03,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:03,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:03,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:03,211 INFO L87 Difference]: Start difference. First operand 152 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:03,833 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-05-03 14:39:04,048 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-03 14:39:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:04,125 INFO L93 Difference]: Finished difference Result 167 states and 362 transitions. [2021-05-03 14:39:04,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:39:04,127 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:04,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:04,127 INFO L225 Difference]: With dead ends: 167 [2021-05-03 14:39:04,127 INFO L226 Difference]: Without dead ends: 167 [2021-05-03 14:39:04,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 990.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:39:04,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-03 14:39:04,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 148. [2021-05-03 14:39:04,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.17687074829932) internal successors, (320), 147 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 320 transitions. [2021-05-03 14:39:04,129 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 320 transitions. Word has length 19 [2021-05-03 14:39:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:04,129 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 320 transitions. [2021-05-03 14:39:04,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 320 transitions. [2021-05-03 14:39:04,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:04,129 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:04,129 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:04,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1882 [2021-05-03 14:39:04,330 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:04,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1548050406, now seen corresponding path program 380 times [2021-05-03 14:39:04,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:04,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281992836] [2021-05-03 14:39:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:04,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281992836] [2021-05-03 14:39:04,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259806880] [2021-05-03 14:39:04,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:04,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:39:04,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:04,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:04,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:04,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:04,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:04,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:04,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:04,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:04,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:04,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:04,869 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-05-03 14:39:04,869 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:04,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:04,871 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:39:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:04,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:04,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:04,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218404782] [2021-05-03 14:39:04,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:04,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:04,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:04,922 INFO L87 Difference]: Start difference. First operand 148 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:05,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:05,251 INFO L93 Difference]: Finished difference Result 177 states and 378 transitions. [2021-05-03 14:39:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:05,253 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:05,253 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:39:05,253 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:39:05,253 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:39:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:39:05,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 149. [2021-05-03 14:39:05,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.175675675675676) internal successors, (322), 148 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:05,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 322 transitions. [2021-05-03 14:39:05,255 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 322 transitions. Word has length 19 [2021-05-03 14:39:05,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:05,255 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 322 transitions. [2021-05-03 14:39:05,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:05,255 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 322 transitions. [2021-05-03 14:39:05,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:05,255 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:05,255 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:05,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1892 [2021-05-03 14:39:05,456 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:05,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:05,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1907966924, now seen corresponding path program 381 times [2021-05-03 14:39:05,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:05,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90078161] [2021-05-03 14:39:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:05,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90078161] [2021-05-03 14:39:05,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755464390] [2021-05-03 14:39:05,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:05,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:39:05,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:05,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:05,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:05,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:05,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:05,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:05,964 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:05,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:05,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:05,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:05,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:05,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:05,978 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:05,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:05,981 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:05,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:05,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:05,989 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:06,098 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-05-03 14:39:06,099 INFO L628 ElimStorePlain]: treesize reduction 81, result has 31.9 percent of original size [2021-05-03 14:39:06,099 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:06,100 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:06,101 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:39:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:06,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:06,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:06,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089890851] [2021-05-03 14:39:06,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:06,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:06,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:06,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:06,231 INFO L87 Difference]: Start difference. First operand 149 states and 322 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:07,053 INFO L93 Difference]: Finished difference Result 191 states and 406 transitions. [2021-05-03 14:39:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:39:07,055 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:07,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:07,055 INFO L225 Difference]: With dead ends: 191 [2021-05-03 14:39:07,055 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:39:07,056 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 785.5ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:39:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:39:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 150. [2021-05-03 14:39:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.174496644295302) internal successors, (324), 149 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:07,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 324 transitions. [2021-05-03 14:39:07,057 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 324 transitions. Word has length 19 [2021-05-03 14:39:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:07,057 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 324 transitions. [2021-05-03 14:39:07,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 324 transitions. [2021-05-03 14:39:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:07,057 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:07,057 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:07,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1893 [2021-05-03 14:39:07,258 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:07,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:07,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1197919154, now seen corresponding path program 382 times [2021-05-03 14:39:07,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:07,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632033192] [2021-05-03 14:39:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:07,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632033192] [2021-05-03 14:39:07,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768483734] [2021-05-03 14:39:07,487 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:07,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:39:07,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:07,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:07,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:07,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:07,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205309516] [2021-05-03 14:39:07,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:07,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:07,886 INFO L87 Difference]: Start difference. First operand 150 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:08,468 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2021-05-03 14:39:08,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:08,574 INFO L93 Difference]: Finished difference Result 163 states and 351 transitions. [2021-05-03 14:39:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:39:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:08,576 INFO L225 Difference]: With dead ends: 163 [2021-05-03 14:39:08,576 INFO L226 Difference]: Without dead ends: 163 [2021-05-03 14:39:08,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 699.0ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:39:08,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-03 14:39:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 148. [2021-05-03 14:39:08,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.17687074829932) internal successors, (320), 147 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:08,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 320 transitions. [2021-05-03 14:39:08,578 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 320 transitions. Word has length 19 [2021-05-03 14:39:08,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:08,578 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 320 transitions. [2021-05-03 14:39:08,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:08,578 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 320 transitions. [2021-05-03 14:39:08,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:08,578 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:08,578 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:08,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1896 [2021-05-03 14:39:08,779 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:08,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:08,779 INFO L82 PathProgramCache]: Analyzing trace with hash -369852718, now seen corresponding path program 383 times [2021-05-03 14:39:08,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:08,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097761273] [2021-05-03 14:39:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097761273] [2021-05-03 14:39:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730703241] [2021-05-03 14:39:09,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:09,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:39:09,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:09,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:09,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:09,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:39:09,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:09,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:09,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:09,373 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:09,459 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:39:09,459 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:09,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:39:09,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:09,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:39:09,490 INFO L518 ElimStorePlain]: Eliminatee v_prenex_321 vanished before elimination [2021-05-03 14:39:09,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:09,491 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:39:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:09,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:09,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:09,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88368804] [2021-05-03 14:39:09,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:09,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:09,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:09,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:09,547 INFO L87 Difference]: Start difference. First operand 148 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:10,008 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-05-03 14:39:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:10,099 INFO L93 Difference]: Finished difference Result 179 states and 374 transitions. [2021-05-03 14:39:10,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:39:10,101 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:10,101 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:39:10,101 INFO L226 Difference]: Without dead ends: 179 [2021-05-03 14:39:10,101 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 583.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-03 14:39:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 150. [2021-05-03 14:39:10,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1812080536912752) internal successors, (325), 149 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 325 transitions. [2021-05-03 14:39:10,103 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 325 transitions. Word has length 19 [2021-05-03 14:39:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:10,103 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 325 transitions. [2021-05-03 14:39:10,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 325 transitions. [2021-05-03 14:39:10,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:10,103 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:10,103 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:10,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1906,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:10,303 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:10,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1640332992, now seen corresponding path program 384 times [2021-05-03 14:39:10,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:10,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912496998] [2021-05-03 14:39:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912496998] [2021-05-03 14:39:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346175520] [2021-05-03 14:39:10,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:10,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:39:10,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:10,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:10,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:10,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:10,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:10,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:10,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325487502] [2021-05-03 14:39:10,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:10,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:10,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:10,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:10,936 INFO L87 Difference]: Start difference. First operand 150 states and 325 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:11,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:11,511 INFO L93 Difference]: Finished difference Result 219 states and 456 transitions. [2021-05-03 14:39:11,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:39:11,513 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:11,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:11,513 INFO L225 Difference]: With dead ends: 219 [2021-05-03 14:39:11,514 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 14:39:11,514 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 529.3ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:39:11,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 14:39:11,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 151. [2021-05-03 14:39:11,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.2) internal successors, (330), 150 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:11,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 330 transitions. [2021-05-03 14:39:11,515 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 330 transitions. Word has length 19 [2021-05-03 14:39:11,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:11,515 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 330 transitions. [2021-05-03 14:39:11,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 330 transitions. [2021-05-03 14:39:11,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:11,516 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:11,516 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:11,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1913,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:11,721 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:11,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:11,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1242787972, now seen corresponding path program 385 times [2021-05-03 14:39:11,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:11,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342911719] [2021-05-03 14:39:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:11,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:11,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342911719] [2021-05-03 14:39:11,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525043643] [2021-05-03 14:39:11,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:11,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:11,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:11,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:12,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:12,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:12,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983173014] [2021-05-03 14:39:12,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:12,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:12,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:12,258 INFO L87 Difference]: Start difference. First operand 151 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:12,714 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-05-03 14:39:12,923 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2021-05-03 14:39:12,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:12,970 INFO L93 Difference]: Finished difference Result 155 states and 334 transitions. [2021-05-03 14:39:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:39:12,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:12,972 INFO L225 Difference]: With dead ends: 155 [2021-05-03 14:39:12,972 INFO L226 Difference]: Without dead ends: 151 [2021-05-03 14:39:12,972 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 707.3ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:39:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-03 14:39:12,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-03 14:39:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1933333333333334) internal successors, (329), 150 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 329 transitions. [2021-05-03 14:39:12,974 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 329 transitions. Word has length 19 [2021-05-03 14:39:12,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:12,974 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 329 transitions. [2021-05-03 14:39:12,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:12,974 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 329 transitions. [2021-05-03 14:39:12,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:12,974 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:12,974 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:13,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1923,386 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:13,175 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:13,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:13,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1155906738, now seen corresponding path program 386 times [2021-05-03 14:39:13,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:13,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855126106] [2021-05-03 14:39:13,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:13,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:13,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855126106] [2021-05-03 14:39:13,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804487802] [2021-05-03 14:39:13,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:13,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:39:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:13,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:13,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:13,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:13,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:13,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:13,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:13,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:13,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:13,744 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:39:13,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:13,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:39:13,750 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:39:13,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:39:13,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:13,761 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:39:13,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:13,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:13,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:13,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298588922] [2021-05-03 14:39:13,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:13,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:13,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:13,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:13,800 INFO L87 Difference]: Start difference. First operand 151 states and 329 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:14,348 INFO L93 Difference]: Finished difference Result 177 states and 381 transitions. [2021-05-03 14:39:14,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:39:14,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:14,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:14,350 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:39:14,350 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:39:14,350 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 428.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:39:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 145. [2021-05-03 14:39:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1805555555555554) internal successors, (314), 144 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 314 transitions. [2021-05-03 14:39:14,352 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 314 transitions. Word has length 19 [2021-05-03 14:39:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:14,352 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 314 transitions. [2021-05-03 14:39:14,352 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 314 transitions. [2021-05-03 14:39:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:14,352 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:14,352 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:14,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1928,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:14,553 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:14,553 INFO L82 PathProgramCache]: Analyzing trace with hash -266095542, now seen corresponding path program 387 times [2021-05-03 14:39:14,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:14,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433474514] [2021-05-03 14:39:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:14,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433474514] [2021-05-03 14:39:14,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700387879] [2021-05-03 14:39:14,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:14,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:39:14,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:14,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:14,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:15,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:15,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:15,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:39:15,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:15,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:15,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:15,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:15,171 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:39:15,171 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:15,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:15,173 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:39:15,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:15,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:15,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:15,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711254296] [2021-05-03 14:39:15,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:15,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:15,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:15,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:15,220 INFO L87 Difference]: Start difference. First operand 145 states and 314 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:15,800 INFO L93 Difference]: Finished difference Result 174 states and 372 transitions. [2021-05-03 14:39:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:39:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:15,802 INFO L225 Difference]: With dead ends: 174 [2021-05-03 14:39:15,802 INFO L226 Difference]: Without dead ends: 174 [2021-05-03 14:39:15,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 516.8ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:39:15,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-03 14:39:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2021-05-03 14:39:15,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.179310344827586) internal successors, (316), 145 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 316 transitions. [2021-05-03 14:39:15,804 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 316 transitions. Word has length 19 [2021-05-03 14:39:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:15,804 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 316 transitions. [2021-05-03 14:39:15,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 316 transitions. [2021-05-03 14:39:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:15,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:15,804 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:16,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1930 [2021-05-03 14:39:16,004 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:16,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:16,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1510874598, now seen corresponding path program 388 times [2021-05-03 14:39:16,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:16,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504503415] [2021-05-03 14:39:16,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:16,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504503415] [2021-05-03 14:39:16,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430675950] [2021-05-03 14:39:16,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:16,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:39:16,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:16,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:16,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:16,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:16,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:16,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:16,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:16,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:16,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:16,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:16,641 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-05-03 14:39:16,642 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:16,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:16,644 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:39:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:16,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:16,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:16,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308473746] [2021-05-03 14:39:16,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:16,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:16,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:16,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:16,696 INFO L87 Difference]: Start difference. First operand 146 states and 316 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:17,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:17,675 INFO L93 Difference]: Finished difference Result 193 states and 410 transitions. [2021-05-03 14:39:17,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:17,677 INFO L225 Difference]: With dead ends: 193 [2021-05-03 14:39:17,677 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 14:39:17,677 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 996.9ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:39:17,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 14:39:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 147. [2021-05-03 14:39:17,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1780821917808217) internal successors, (318), 146 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:17,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 318 transitions. [2021-05-03 14:39:17,678 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 318 transitions. Word has length 19 [2021-05-03 14:39:17,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:17,678 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 318 transitions. [2021-05-03 14:39:17,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:17,679 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 318 transitions. [2021-05-03 14:39:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:17,679 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:17,679 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:17,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1934,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:17,879 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:17,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:17,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1870791116, now seen corresponding path program 389 times [2021-05-03 14:39:17,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:17,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659185079] [2021-05-03 14:39:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:18,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:18,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659185079] [2021-05-03 14:39:18,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181307456] [2021-05-03 14:39:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:18,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:39:18,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:18,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:18,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:18,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:18,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:18,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:18,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:18,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:18,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:18,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:18,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:18,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:18,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:18,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:18,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:18,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:39:18,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:18,624 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:39:18,625 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:18,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:18,627 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:39:18,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:18,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:18,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:18,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47311889] [2021-05-03 14:39:18,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:18,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:18,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:18,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:18,741 INFO L87 Difference]: Start difference. First operand 147 states and 318 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:20,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:20,032 INFO L93 Difference]: Finished difference Result 201 states and 427 transitions. [2021-05-03 14:39:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:39:20,034 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:20,034 INFO L225 Difference]: With dead ends: 201 [2021-05-03 14:39:20,034 INFO L226 Difference]: Without dead ends: 201 [2021-05-03 14:39:20,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1268.7ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:39:20,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-03 14:39:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 148. [2021-05-03 14:39:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.17687074829932) internal successors, (320), 147 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 320 transitions. [2021-05-03 14:39:20,036 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 320 transitions. Word has length 19 [2021-05-03 14:39:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:20,036 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 320 transitions. [2021-05-03 14:39:20,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 320 transitions. [2021-05-03 14:39:20,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:20,036 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:20,036 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:20,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1935 [2021-05-03 14:39:20,237 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:20,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:20,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1160743346, now seen corresponding path program 390 times [2021-05-03 14:39:20,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:20,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019685383] [2021-05-03 14:39:20,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:20,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019685383] [2021-05-03 14:39:20,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301788527] [2021-05-03 14:39:20,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:20,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:39:20,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:20,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:20,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:20,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:20,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:20,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:20,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:20,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:20,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:20,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:20,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:20,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:20,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:20,848 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:20,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:20,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:20,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:20,952 INFO L628 ElimStorePlain]: treesize reduction 71, result has 32.4 percent of original size [2021-05-03 14:39:20,953 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:20,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:20,955 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-05-03 14:39:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:21,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:21,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:21,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034255636] [2021-05-03 14:39:21,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:21,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:21,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:21,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:21,067 INFO L87 Difference]: Start difference. First operand 148 states and 320 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:21,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:21,712 INFO L93 Difference]: Finished difference Result 165 states and 355 transitions. [2021-05-03 14:39:21,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:21,714 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:21,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:21,714 INFO L225 Difference]: With dead ends: 165 [2021-05-03 14:39:21,714 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:39:21,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:39:21,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:39:21,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 145. [2021-05-03 14:39:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1805555555555554) internal successors, (314), 144 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 314 transitions. [2021-05-03 14:39:21,716 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 314 transitions. Word has length 19 [2021-05-03 14:39:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:21,716 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 314 transitions. [2021-05-03 14:39:21,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 314 transitions. [2021-05-03 14:39:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:21,716 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:21,716 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:21,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1945,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:21,917 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:21,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1898294418, now seen corresponding path program 391 times [2021-05-03 14:39:21,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:21,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216539620] [2021-05-03 14:39:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:22,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:22,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216539620] [2021-05-03 14:39:22,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575248728] [2021-05-03 14:39:22,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:22,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:22,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:22,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:22,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:39:22,454 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:22,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:22,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:22,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:22,501 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:39:22,502 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:22,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:22,504 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:39:22,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:22,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:22,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:22,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758095407] [2021-05-03 14:39:22,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:22,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:22,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:22,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:22,520 INFO L87 Difference]: Start difference. First operand 145 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:23,186 INFO L93 Difference]: Finished difference Result 175 states and 374 transitions. [2021-05-03 14:39:23,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:39:23,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:23,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:23,188 INFO L225 Difference]: With dead ends: 175 [2021-05-03 14:39:23,188 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 14:39:23,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 548.6ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:39:23,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 14:39:23,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 145. [2021-05-03 14:39:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1805555555555554) internal successors, (314), 144 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 314 transitions. [2021-05-03 14:39:23,190 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 314 transitions. Word has length 19 [2021-05-03 14:39:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:23,190 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 314 transitions. [2021-05-03 14:39:23,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 314 transitions. [2021-05-03 14:39:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:23,190 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:23,190 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:23,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1949,392 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:23,391 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:23,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:23,391 INFO L82 PathProgramCache]: Analyzing trace with hash 888308930, now seen corresponding path program 392 times [2021-05-03 14:39:23,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:23,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944440355] [2021-05-03 14:39:23,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:23,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944440355] [2021-05-03 14:39:23,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620882826] [2021-05-03 14:39:23,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:23,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:39:23,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:23,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:23,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:23,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:23,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:23,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:23,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:23,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:23,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:23,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:23,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:23,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:23,845 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:23,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:23,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:23,850 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:23,980 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 14:39:23,981 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-05-03 14:39:23,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:23,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:39:23,991 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:39:24,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:39:24,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:24,034 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:39:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:24,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:24,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:24,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222507596] [2021-05-03 14:39:24,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:24,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:24,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:24,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:24,158 INFO L87 Difference]: Start difference. First operand 145 states and 314 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:25,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:25,038 INFO L93 Difference]: Finished difference Result 192 states and 408 transitions. [2021-05-03 14:39:25,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:25,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:25,040 INFO L225 Difference]: With dead ends: 192 [2021-05-03 14:39:25,040 INFO L226 Difference]: Without dead ends: 192 [2021-05-03 14:39:25,041 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 829.0ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:39:25,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-03 14:39:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 145. [2021-05-03 14:39:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1805555555555554) internal successors, (314), 144 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:25,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 314 transitions. [2021-05-03 14:39:25,042 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 314 transitions. Word has length 19 [2021-05-03 14:39:25,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:25,042 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 314 transitions. [2021-05-03 14:39:25,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:25,042 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 314 transitions. [2021-05-03 14:39:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:25,043 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:25,043 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:25,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1953,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:25,243 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:25,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:25,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1396472656, now seen corresponding path program 393 times [2021-05-03 14:39:25,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:25,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61178855] [2021-05-03 14:39:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:25,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61178855] [2021-05-03 14:39:25,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64171336] [2021-05-03 14:39:25,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:25,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:39:25,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:25,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:25,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:25,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:25,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:25,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328498254] [2021-05-03 14:39:25,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:25,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:25,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:25,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:25,879 INFO L87 Difference]: Start difference. First operand 145 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:26,623 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:39:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:26,738 INFO L93 Difference]: Finished difference Result 159 states and 343 transitions. [2021-05-03 14:39:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:39:26,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:26,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:26,740 INFO L225 Difference]: With dead ends: 159 [2021-05-03 14:39:26,740 INFO L226 Difference]: Without dead ends: 159 [2021-05-03 14:39:26,740 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 897.2ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:39:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-03 14:39:26,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2021-05-03 14:39:26,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1702127659574466) internal successors, (306), 141 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 306 transitions. [2021-05-03 14:39:26,742 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 306 transitions. Word has length 19 [2021-05-03 14:39:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:26,742 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 306 transitions. [2021-05-03 14:39:26,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 306 transitions. [2021-05-03 14:39:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:26,742 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:26,742 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:26,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1956,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:26,942 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:26,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1218475190, now seen corresponding path program 394 times [2021-05-03 14:39:26,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:26,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016014213] [2021-05-03 14:39:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:26,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:27,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016014213] [2021-05-03 14:39:27,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513463463] [2021-05-03 14:39:27,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:27,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:39:27,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:27,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:27,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:27,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:27,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:27,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:27,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:27,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:27,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:27,644 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-05-03 14:39:27,645 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:39:27,645 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:27,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:39:27,652 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:27,693 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:39:27,693 INFO L518 ElimStorePlain]: Eliminatee v_prenex_324 vanished before elimination [2021-05-03 14:39:27,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:27,695 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:39:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:27,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:27,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:27,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747801063] [2021-05-03 14:39:27,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:27,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:27,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:27,794 INFO L87 Difference]: Start difference. First operand 142 states and 306 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:28,197 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:39:28,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:28,243 INFO L93 Difference]: Finished difference Result 173 states and 360 transitions. [2021-05-03 14:39:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:39:28,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:28,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:28,244 INFO L225 Difference]: With dead ends: 173 [2021-05-03 14:39:28,244 INFO L226 Difference]: Without dead ends: 173 [2021-05-03 14:39:28,244 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 595.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:28,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-03 14:39:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 144. [2021-05-03 14:39:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.174825174825175) internal successors, (311), 143 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 311 transitions. [2021-05-03 14:39:28,246 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 311 transitions. Word has length 19 [2021-05-03 14:39:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:28,246 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 311 transitions. [2021-05-03 14:39:28,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 311 transitions. [2021-05-03 14:39:28,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:28,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:28,246 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:28,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1966,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:28,447 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:28,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:28,447 INFO L82 PathProgramCache]: Analyzing trace with hash 791710520, now seen corresponding path program 395 times [2021-05-03 14:39:28,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:28,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038751978] [2021-05-03 14:39:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:28,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038751978] [2021-05-03 14:39:28,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959964612] [2021-05-03 14:39:28,638 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:28,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:39:28,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:28,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:28,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:29,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:29,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:29,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959338547] [2021-05-03 14:39:29,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:29,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:29,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:29,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:29,092 INFO L87 Difference]: Start difference. First operand 144 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:29,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:29,753 INFO L93 Difference]: Finished difference Result 213 states and 442 transitions. [2021-05-03 14:39:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:29,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:29,754 INFO L225 Difference]: With dead ends: 213 [2021-05-03 14:39:29,754 INFO L226 Difference]: Without dead ends: 213 [2021-05-03 14:39:29,754 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 486.9ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:39:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-03 14:39:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 145. [2021-05-03 14:39:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1944444444444446) internal successors, (316), 144 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 316 transitions. [2021-05-03 14:39:29,756 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 316 transitions. Word has length 19 [2021-05-03 14:39:29,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:29,756 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 316 transitions. [2021-05-03 14:39:29,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:29,756 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 316 transitions. [2021-05-03 14:39:29,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:29,756 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:29,756 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:29,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1973 [2021-05-03 14:39:29,956 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:29,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:29,957 INFO L82 PathProgramCache]: Analyzing trace with hash -2091410444, now seen corresponding path program 396 times [2021-05-03 14:39:29,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:29,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981844896] [2021-05-03 14:39:29,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:30,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:30,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981844896] [2021-05-03 14:39:30,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165073531] [2021-05-03 14:39:30,187 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:30,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:39:30,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:30,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:30,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:30,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:30,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:30,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51356717] [2021-05-03 14:39:30,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:30,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:30,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:30,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:30,578 INFO L87 Difference]: Start difference. First operand 145 states and 316 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:31,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:31,028 INFO L93 Difference]: Finished difference Result 149 states and 320 transitions. [2021-05-03 14:39:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:39:31,029 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:31,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:31,030 INFO L225 Difference]: With dead ends: 149 [2021-05-03 14:39:31,030 INFO L226 Difference]: Without dead ends: 145 [2021-05-03 14:39:31,030 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 517.2ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-03 14:39:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-03 14:39:31,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1875) internal successors, (315), 144 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 315 transitions. [2021-05-03 14:39:31,031 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 315 transitions. Word has length 19 [2021-05-03 14:39:31,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:31,031 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 315 transitions. [2021-05-03 14:39:31,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:31,031 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 315 transitions. [2021-05-03 14:39:31,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:31,031 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:31,031 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:31,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1985 [2021-05-03 14:39:31,232 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:31,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:31,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2004529210, now seen corresponding path program 397 times [2021-05-03 14:39:31,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:31,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501535937] [2021-05-03 14:39:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:31,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501535937] [2021-05-03 14:39:31,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3790680] [2021-05-03 14:39:31,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:31,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:31,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:31,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:31,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:31,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:31,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:31,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:31,805 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:31,857 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:39:31,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:31,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:39:31,866 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:39:31,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:39:31,882 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:31,882 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:39:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:31,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:31,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:31,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474782078] [2021-05-03 14:39:31,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:31,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:31,941 INFO L87 Difference]: Start difference. First operand 145 states and 315 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:32,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:32,438 INFO L93 Difference]: Finished difference Result 171 states and 367 transitions. [2021-05-03 14:39:32,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:39:32,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:32,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:32,439 INFO L225 Difference]: With dead ends: 171 [2021-05-03 14:39:32,439 INFO L226 Difference]: Without dead ends: 171 [2021-05-03 14:39:32,439 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 465.3ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-03 14:39:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 140. [2021-05-03 14:39:32,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.172661870503597) internal successors, (302), 139 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:32,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 302 transitions. [2021-05-03 14:39:32,441 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 302 transitions. Word has length 19 [2021-05-03 14:39:32,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:32,441 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 302 transitions. [2021-05-03 14:39:32,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:32,441 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 302 transitions. [2021-05-03 14:39:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:32,441 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:32,441 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:32,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1989,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:32,641 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:32,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:32,642 INFO L82 PathProgramCache]: Analyzing trace with hash 208351514, now seen corresponding path program 398 times [2021-05-03 14:39:32,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:32,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223228522] [2021-05-03 14:39:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:32,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223228522] [2021-05-03 14:39:32,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554923046] [2021-05-03 14:39:32,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:32,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:39:32,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:32,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:32,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:33,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:33,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:33,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:33,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:33,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:33,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:33,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:33,250 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-05-03 14:39:33,250 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:33,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:33,252 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:39:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:33,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:33,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:33,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779578412] [2021-05-03 14:39:33,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:33,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:33,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:33,305 INFO L87 Difference]: Start difference. First operand 140 states and 302 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:33,802 INFO L93 Difference]: Finished difference Result 182 states and 386 transitions. [2021-05-03 14:39:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:39:33,804 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:33,804 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:39:33,804 INFO L226 Difference]: Without dead ends: 182 [2021-05-03 14:39:33,804 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 563.2ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:39:33,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-03 14:39:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 141. [2021-05-03 14:39:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1714285714285713) internal successors, (304), 140 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 304 transitions. [2021-05-03 14:39:33,806 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 304 transitions. Word has length 19 [2021-05-03 14:39:33,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:33,806 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 304 transitions. [2021-05-03 14:39:33,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:33,806 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 304 transitions. [2021-05-03 14:39:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:33,806 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:33,806 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:34,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1991 [2021-05-03 14:39:34,006 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:34,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:34,007 INFO L82 PathProgramCache]: Analyzing trace with hash -151565004, now seen corresponding path program 399 times [2021-05-03 14:39:34,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:34,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525672248] [2021-05-03 14:39:34,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:34,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525672248] [2021-05-03 14:39:34,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700443654] [2021-05-03 14:39:34,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:34,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:39:34,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:34,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:34,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:34,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:34,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:34,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:34,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:34,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:34,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:34,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:34,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:34,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:34,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:34,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:34,526 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:34,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:34,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:39:34,535 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:34,628 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:39:34,628 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:34,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:34,630 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:39:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:34,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:34,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:34,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498046161] [2021-05-03 14:39:34,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:34,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:34,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:34,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:34,748 INFO L87 Difference]: Start difference. First operand 141 states and 304 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:35,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:35,556 INFO L93 Difference]: Finished difference Result 195 states and 413 transitions. [2021-05-03 14:39:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:39:35,558 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:35,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:35,559 INFO L225 Difference]: With dead ends: 195 [2021-05-03 14:39:35,559 INFO L226 Difference]: Without dead ends: 195 [2021-05-03 14:39:35,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 765.3ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:39:35,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-03 14:39:35,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2021-05-03 14:39:35,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1702127659574466) internal successors, (306), 141 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 306 transitions. [2021-05-03 14:39:35,560 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 306 transitions. Word has length 19 [2021-05-03 14:39:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:35,560 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 306 transitions. [2021-05-03 14:39:35,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 306 transitions. [2021-05-03 14:39:35,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:35,561 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:35,561 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:35,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1992 [2021-05-03 14:39:35,761 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:35,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:35,761 INFO L82 PathProgramCache]: Analyzing trace with hash 558482766, now seen corresponding path program 400 times [2021-05-03 14:39:35,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:35,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029544662] [2021-05-03 14:39:35,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:36,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029544662] [2021-05-03 14:39:36,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136366109] [2021-05-03 14:39:36,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:36,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:39:36,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:36,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:36,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:36,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:36,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:36,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24148784] [2021-05-03 14:39:36,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:36,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:36,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:36,360 INFO L87 Difference]: Start difference. First operand 142 states and 306 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:37,003 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:39:37,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:37,114 INFO L93 Difference]: Finished difference Result 158 states and 339 transitions. [2021-05-03 14:39:37,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:37,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:37,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:37,116 INFO L225 Difference]: With dead ends: 158 [2021-05-03 14:39:37,116 INFO L226 Difference]: Without dead ends: 158 [2021-05-03 14:39:37,116 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 788.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:39:37,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-03 14:39:37,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 140. [2021-05-03 14:39:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.172661870503597) internal successors, (302), 139 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 302 transitions. [2021-05-03 14:39:37,118 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 302 transitions. Word has length 19 [2021-05-03 14:39:37,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:37,118 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 302 transitions. [2021-05-03 14:39:37,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:37,118 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 302 transitions. [2021-05-03 14:39:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:37,118 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:37,118 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:37,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2002,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:37,319 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:37,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:37,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1610480670, now seen corresponding path program 401 times [2021-05-03 14:39:37,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:37,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123638803] [2021-05-03 14:39:37,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:37,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:37,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:37,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123638803] [2021-05-03 14:39:37,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609629092] [2021-05-03 14:39:37,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:37,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:39:37,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:37,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:37,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:38,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:38,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:38,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:38,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595513526] [2021-05-03 14:39:38,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:38,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:38,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:38,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:38,007 INFO L87 Difference]: Start difference. First operand 140 states and 302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:39,064 INFO L93 Difference]: Finished difference Result 196 states and 407 transitions. [2021-05-03 14:39:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:39:39,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:39,066 INFO L225 Difference]: With dead ends: 196 [2021-05-03 14:39:39,066 INFO L226 Difference]: Without dead ends: 193 [2021-05-03 14:39:39,066 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 938.2ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:39:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-03 14:39:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 145. [2021-05-03 14:39:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.173611111111111) internal successors, (313), 144 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 313 transitions. [2021-05-03 14:39:39,068 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 313 transitions. Word has length 19 [2021-05-03 14:39:39,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:39,068 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 313 transitions. [2021-05-03 14:39:39,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:39,068 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 313 transitions. [2021-05-03 14:39:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:39,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:39,068 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:39,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2012 [2021-05-03 14:39:39,268 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:39,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:39,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2036618172, now seen corresponding path program 402 times [2021-05-03 14:39:39,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:39,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803014273] [2021-05-03 14:39:39,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803014273] [2021-05-03 14:39:39,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967942411] [2021-05-03 14:39:39,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:39,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:39:39,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:39,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:39,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:39,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:39,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:39,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:39,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:39,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:39,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:40,018 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-05-03 14:39:40,019 INFO L628 ElimStorePlain]: treesize reduction 76, result has 40.2 percent of original size [2021-05-03 14:39:40,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:40,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:39:40,026 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:40,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:39:40,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:40,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:39:40,087 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:39:40,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:39:40,136 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-05-03 14:39:40,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:40,139 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:39:40,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:40,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:40,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:40,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219585250] [2021-05-03 14:39:40,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:40,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:40,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:40,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:40,268 INFO L87 Difference]: Start difference. First operand 145 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:41,190 INFO L93 Difference]: Finished difference Result 181 states and 377 transitions. [2021-05-03 14:39:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:39:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:41,192 INFO L225 Difference]: With dead ends: 181 [2021-05-03 14:39:41,192 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:39:41,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 855.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:39:41,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:39:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 145. [2021-05-03 14:39:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.173611111111111) internal successors, (313), 144 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:41,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 313 transitions. [2021-05-03 14:39:41,194 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 313 transitions. Word has length 19 [2021-05-03 14:39:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:41,194 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 313 transitions. [2021-05-03 14:39:41,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:41,194 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 313 transitions. [2021-05-03 14:39:41,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:41,194 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:41,194 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:41,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2023 [2021-05-03 14:39:41,394 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:41,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1548301354, now seen corresponding path program 403 times [2021-05-03 14:39:41,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:41,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099848405] [2021-05-03 14:39:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:41,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099848405] [2021-05-03 14:39:41,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837871538] [2021-05-03 14:39:41,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:41,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:41,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:42,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:42,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:42,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:42,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151418981] [2021-05-03 14:39:42,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:42,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:42,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:42,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:42,144 INFO L87 Difference]: Start difference. First operand 145 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:43,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:43,067 INFO L93 Difference]: Finished difference Result 204 states and 425 transitions. [2021-05-03 14:39:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:39:43,069 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:43,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:43,069 INFO L225 Difference]: With dead ends: 204 [2021-05-03 14:39:43,069 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 14:39:43,069 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1028.9ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:39:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 14:39:43,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 144. [2021-05-03 14:39:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.174825174825175) internal successors, (311), 143 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:43,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 311 transitions. [2021-05-03 14:39:43,071 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 311 transitions. Word has length 19 [2021-05-03 14:39:43,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:43,071 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 311 transitions. [2021-05-03 14:39:43,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:43,071 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 311 transitions. [2021-05-03 14:39:43,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:43,071 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:43,071 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:43,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2027,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:43,272 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:43,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:43,272 INFO L82 PathProgramCache]: Analyzing trace with hash 513613948, now seen corresponding path program 404 times [2021-05-03 14:39:43,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:43,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908859331] [2021-05-03 14:39:43,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:43,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:43,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908859331] [2021-05-03 14:39:43,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183951045] [2021-05-03 14:39:43,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:43,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:39:43,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:43,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:43,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:43,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:43,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:43,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:43,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7561236] [2021-05-03 14:39:43,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:43,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:43,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:43,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:43,903 INFO L87 Difference]: Start difference. First operand 144 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:44,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:44,477 INFO L93 Difference]: Finished difference Result 148 states and 315 transitions. [2021-05-03 14:39:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:39:44,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:44,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:44,479 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:39:44,479 INFO L226 Difference]: Without dead ends: 144 [2021-05-03 14:39:44,480 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 726.9ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:39:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-03 14:39:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-05-03 14:39:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.167832167832168) internal successors, (310), 143 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:44,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 310 transitions. [2021-05-03 14:39:44,481 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 310 transitions. Word has length 19 [2021-05-03 14:39:44,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:44,481 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 310 transitions. [2021-05-03 14:39:44,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:44,481 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 310 transitions. [2021-05-03 14:39:44,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:44,481 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:44,481 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:44,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2039 [2021-05-03 14:39:44,682 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:44,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:44,682 INFO L82 PathProgramCache]: Analyzing trace with hash 600495182, now seen corresponding path program 405 times [2021-05-03 14:39:44,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:44,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392051938] [2021-05-03 14:39:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:44,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392051938] [2021-05-03 14:39:44,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137317796] [2021-05-03 14:39:44,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:44,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:39:44,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:44,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:44,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:45,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:45,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:45,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316374946] [2021-05-03 14:39:45,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:45,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:45,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:45,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:45,356 INFO L87 Difference]: Start difference. First operand 144 states and 310 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:46,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:46,004 INFO L93 Difference]: Finished difference Result 169 states and 363 transitions. [2021-05-03 14:39:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:46,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:46,006 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:39:46,006 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:39:46,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 645.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:39:46,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:39:46,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 137. [2021-05-03 14:39:46,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.161764705882353) internal successors, (294), 136 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 294 transitions. [2021-05-03 14:39:46,008 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 294 transitions. Word has length 19 [2021-05-03 14:39:46,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:46,008 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 294 transitions. [2021-05-03 14:39:46,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:46,008 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 294 transitions. [2021-05-03 14:39:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:46,008 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:46,008 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:46,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2044,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:46,208 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:46,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:46,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1150819892, now seen corresponding path program 406 times [2021-05-03 14:39:46,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:46,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641733029] [2021-05-03 14:39:46,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:46,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:46,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641733029] [2021-05-03 14:39:46,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300190050] [2021-05-03 14:39:46,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:46,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:39:46,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:46,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:46,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:46,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:46,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:46,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:46,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:46,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:39:46,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:46,958 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 14:39:46,959 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:39:46,959 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:46,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:39:46,966 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:47,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:39:47,010 INFO L518 ElimStorePlain]: Eliminatee v_prenex_331 vanished before elimination [2021-05-03 14:39:47,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:39:47,012 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:39:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:47,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:47,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:47,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43948936] [2021-05-03 14:39:47,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:47,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:47,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:47,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:47,145 INFO L87 Difference]: Start difference. First operand 137 states and 294 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:48,118 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:39:48,406 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:39:48,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:48,741 INFO L93 Difference]: Finished difference Result 178 states and 371 transitions. [2021-05-03 14:39:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:48,743 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:48,743 INFO L225 Difference]: With dead ends: 178 [2021-05-03 14:39:48,744 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 14:39:48,744 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1249.6ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:39:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 14:39:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 140. [2021-05-03 14:39:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.172661870503597) internal successors, (302), 139 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 302 transitions. [2021-05-03 14:39:48,745 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 302 transitions. Word has length 19 [2021-05-03 14:39:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:48,745 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 302 transitions. [2021-05-03 14:39:48,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 302 transitions. [2021-05-03 14:39:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:48,746 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:48,746 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:48,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-05-03 14:39:48,946 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:48,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:48,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1860867662, now seen corresponding path program 407 times [2021-05-03 14:39:48,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:48,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207219530] [2021-05-03 14:39:48,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207219530] [2021-05-03 14:39:49,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848485357] [2021-05-03 14:39:49,164 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:49,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:39:49,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:49,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:49,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:49,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:49,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323189678] [2021-05-03 14:39:49,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:49,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:49,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:49,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:49,624 INFO L87 Difference]: Start difference. First operand 140 states and 302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:50,365 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:39:50,661 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:39:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:50,857 INFO L93 Difference]: Finished difference Result 224 states and 460 transitions. [2021-05-03 14:39:50,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:39:50,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:50,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:50,860 INFO L225 Difference]: With dead ends: 224 [2021-05-03 14:39:50,860 INFO L226 Difference]: Without dead ends: 224 [2021-05-03 14:39:50,860 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1062.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:39:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-03 14:39:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 142. [2021-05-03 14:39:50,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.198581560283688) internal successors, (310), 141 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:50,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 310 transitions. [2021-05-03 14:39:50,861 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 310 transitions. Word has length 19 [2021-05-03 14:39:50,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:50,861 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 310 transitions. [2021-05-03 14:39:50,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:50,861 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 310 transitions. [2021-05-03 14:39:50,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:50,862 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:50,862 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:51,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2055,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:51,062 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash -372184332, now seen corresponding path program 408 times [2021-05-03 14:39:51,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:51,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961287338] [2021-05-03 14:39:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:51,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961287338] [2021-05-03 14:39:51,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686159003] [2021-05-03 14:39:51,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:51,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:39:51,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:51,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:51,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:51,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:51,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:51,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071910194] [2021-05-03 14:39:51,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:51,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:51,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:51,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:51,744 INFO L87 Difference]: Start difference. First operand 142 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:52,426 INFO L93 Difference]: Finished difference Result 151 states and 322 transitions. [2021-05-03 14:39:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:39:52,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:52,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:52,428 INFO L225 Difference]: With dead ends: 151 [2021-05-03 14:39:52,428 INFO L226 Difference]: Without dead ends: 147 [2021-05-03 14:39:52,428 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 788.0ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:39:52,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-03 14:39:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-05-03 14:39:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1914893617021276) internal successors, (309), 141 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 309 transitions. [2021-05-03 14:39:52,430 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 309 transitions. Word has length 19 [2021-05-03 14:39:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:52,430 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 309 transitions. [2021-05-03 14:39:52,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 309 transitions. [2021-05-03 14:39:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:52,430 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:52,430 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:52,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2067 [2021-05-03 14:39:52,631 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:52,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:52,631 INFO L82 PathProgramCache]: Analyzing trace with hash -285303098, now seen corresponding path program 409 times [2021-05-03 14:39:52,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:52,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482722166] [2021-05-03 14:39:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:52,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482722166] [2021-05-03 14:39:52,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138300792] [2021-05-03 14:39:52,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:52,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:52,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:52,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:53,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:53,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:53,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:53,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:53,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:53,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:53,302 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:53,363 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:39:53,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:53,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:39:53,373 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:39:53,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:39:53,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:53,390 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:39:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:53,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:53,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:53,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318838204] [2021-05-03 14:39:53,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:53,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:53,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:53,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:53,457 INFO L87 Difference]: Start difference. First operand 142 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:54,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:54,413 INFO L93 Difference]: Finished difference Result 184 states and 389 transitions. [2021-05-03 14:39:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:54,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:54,415 INFO L225 Difference]: With dead ends: 184 [2021-05-03 14:39:54,416 INFO L226 Difference]: Without dead ends: 184 [2021-05-03 14:39:54,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1089.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:39:54,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-03 14:39:54,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 141. [2021-05-03 14:39:54,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.192857142857143) internal successors, (307), 140 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 307 transitions. [2021-05-03 14:39:54,417 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 307 transitions. Word has length 19 [2021-05-03 14:39:54,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:54,417 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 307 transitions. [2021-05-03 14:39:54,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:54,417 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 307 transitions. [2021-05-03 14:39:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:54,417 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:54,418 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:54,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2072,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:54,618 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:54,618 INFO L82 PathProgramCache]: Analyzing trace with hash -878530598, now seen corresponding path program 410 times [2021-05-03 14:39:54,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:54,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372290347] [2021-05-03 14:39:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:54,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372290347] [2021-05-03 14:39:54,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937726241] [2021-05-03 14:39:54,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:54,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:39:54,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:54,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:54,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:55,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:55,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:55,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904776670] [2021-05-03 14:39:55,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:55,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:55,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:55,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:55,278 INFO L87 Difference]: Start difference. First operand 141 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:55,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:55,851 INFO L93 Difference]: Finished difference Result 147 states and 314 transitions. [2021-05-03 14:39:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:39:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:55,853 INFO L225 Difference]: With dead ends: 147 [2021-05-03 14:39:55,853 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:39:55,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:55,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:39:55,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-03 14:39:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1857142857142855) internal successors, (306), 140 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:55,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 306 transitions. [2021-05-03 14:39:55,855 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 306 transitions. Word has length 19 [2021-05-03 14:39:55,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:55,855 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 306 transitions. [2021-05-03 14:39:55,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:55,855 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 306 transitions. [2021-05-03 14:39:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:55,855 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:55,855 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:56,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2074,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:56,056 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:56,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1902880078, now seen corresponding path program 411 times [2021-05-03 14:39:56,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:56,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765001215] [2021-05-03 14:39:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:56,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765001215] [2021-05-03 14:39:56,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901470497] [2021-05-03 14:39:56,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:56,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:39:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:56,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:56,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:56,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:56,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:56,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806741323] [2021-05-03 14:39:56,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:56,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:56,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:56,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:56,730 INFO L87 Difference]: Start difference. First operand 141 states and 306 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:57,242 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-05-03 14:39:57,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:57,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:57,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:57,244 INFO L225 Difference]: With dead ends: 168 [2021-05-03 14:39:57,244 INFO L226 Difference]: Without dead ends: 168 [2021-05-03 14:39:57,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:57,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-03 14:39:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 134. [2021-05-03 14:39:57,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:57,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-05-03 14:39:57,246 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-05-03 14:39:57,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:57,246 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-05-03 14:39:57,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:57,246 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-05-03 14:39:57,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:57,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:57,246 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:57,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2078 [2021-05-03 14:39:57,447 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:57,447 INFO L82 PathProgramCache]: Analyzing trace with hash -803588398, now seen corresponding path program 412 times [2021-05-03 14:39:57,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:57,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092101577] [2021-05-03 14:39:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:57,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:57,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092101577] [2021-05-03 14:39:57,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929571252] [2021-05-03 14:39:57,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:57,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:39:57,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:57,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:39:57,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:58,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:58,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:58,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:58,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:58,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:58,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:39:58,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:58,122 INFO L628 ElimStorePlain]: treesize reduction 40, result has 29.8 percent of original size [2021-05-03 14:39:58,122 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:58,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:58,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:39:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:58,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:58,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:39:58,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101596545] [2021-05-03 14:39:58,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:39:58,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:58,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:39:58,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:39:58,185 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:58,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:39:58,922 INFO L93 Difference]: Finished difference Result 179 states and 378 transitions. [2021-05-03 14:39:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:39:58,923 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:39:58,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:39:58,923 INFO L225 Difference]: With dead ends: 179 [2021-05-03 14:39:58,923 INFO L226 Difference]: Without dead ends: 179 [2021-05-03 14:39:58,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 665.7ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:39:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-03 14:39:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 135. [2021-05-03 14:39:58,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-05-03 14:39:58,925 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-05-03 14:39:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:39:58,925 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-05-03 14:39:58,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:39:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-05-03 14:39:58,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:39:58,925 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:39:58,925 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:39:59,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2082,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:59,126 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:39:59,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:39:59,126 INFO L82 PathProgramCache]: Analyzing trace with hash -2048367454, now seen corresponding path program 413 times [2021-05-03 14:39:59,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:39:59,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463845783] [2021-05-03 14:39:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:39:59,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:39:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:59,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463845783] [2021-05-03 14:39:59,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667938794] [2021-05-03 14:39:59,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:39:59,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:39:59,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:39:59,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:39:59,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:39:59,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:59,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:59,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:39:59,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:59,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:39:59,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:39:59,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:39:59,822 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:39:59,823 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:39:59,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:39:59,824 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:39:59,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:39:59,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:39:59,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:39:59,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487084764] [2021-05-03 14:39:59,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:39:59,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:39:59,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:39:59,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:39:59,841 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:01,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:01,019 INFO L93 Difference]: Finished difference Result 191 states and 402 transitions. [2021-05-03 14:40:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:40:01,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:01,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:01,021 INFO L225 Difference]: With dead ends: 191 [2021-05-03 14:40:01,021 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:40:01,022 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1099.8ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:40:01,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:40:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 136. [2021-05-03 14:40:01,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.162962962962963) internal successors, (292), 135 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:01,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 292 transitions. [2021-05-03 14:40:01,023 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 292 transitions. Word has length 19 [2021-05-03 14:40:01,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:01,023 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 292 transitions. [2021-05-03 14:40:01,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 292 transitions. [2021-05-03 14:40:01,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:01,024 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:01,024 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:01,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2083 [2021-05-03 14:40:01,237 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:01,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:01,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1886683324, now seen corresponding path program 414 times [2021-05-03 14:40:01,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:01,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599592484] [2021-05-03 14:40:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:01,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599592484] [2021-05-03 14:40:01,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015308873] [2021-05-03 14:40:01,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:01,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:40:01,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:01,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:01,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:01,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:01,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:01,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:01,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:01,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:01,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:01,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:01,811 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:01,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:01,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:01,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:01,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:01,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:01,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:01,830 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:01,957 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-05-03 14:40:01,958 INFO L628 ElimStorePlain]: treesize reduction 81, result has 31.9 percent of original size [2021-05-03 14:40:01,958 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:01,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:01,960 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:40:02,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:02,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:02,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:02,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832205182] [2021-05-03 14:40:02,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:02,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:02,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:02,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:02,105 INFO L87 Difference]: Start difference. First operand 136 states and 292 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:02,489 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-05-03 14:40:03,486 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:40:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:03,953 INFO L93 Difference]: Finished difference Result 204 states and 429 transitions. [2021-05-03 14:40:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:40:03,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:03,956 INFO L225 Difference]: With dead ends: 204 [2021-05-03 14:40:03,956 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 14:40:03,956 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 1608.2ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:40:03,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 14:40:03,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 137. [2021-05-03 14:40:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.161764705882353) internal successors, (294), 136 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 294 transitions. [2021-05-03 14:40:03,957 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 294 transitions. Word has length 19 [2021-05-03 14:40:03,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:03,957 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 294 transitions. [2021-05-03 14:40:03,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 294 transitions. [2021-05-03 14:40:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:03,958 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:03,958 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:04,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2087,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:04,158 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:04,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1698236202, now seen corresponding path program 415 times [2021-05-03 14:40:04,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:04,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973464477] [2021-05-03 14:40:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:04,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:04,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973464477] [2021-05-03 14:40:04,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352318048] [2021-05-03 14:40:04,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:04,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:04,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:04,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:04,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:04,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:04,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:04,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102386287] [2021-05-03 14:40:04,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:04,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:04,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:04,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:04,996 INFO L87 Difference]: Start difference. First operand 137 states and 294 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:05,277 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 14:40:05,918 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 14:40:06,184 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:40:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:06,282 INFO L93 Difference]: Finished difference Result 162 states and 345 transitions. [2021-05-03 14:40:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:40:06,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:06,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:06,284 INFO L225 Difference]: With dead ends: 162 [2021-05-03 14:40:06,284 INFO L226 Difference]: Without dead ends: 162 [2021-05-03 14:40:06,284 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1314.9ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:40:06,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-03 14:40:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2021-05-03 14:40:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-05-03 14:40:06,286 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-05-03 14:40:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:06,286 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-05-03 14:40:06,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-05-03 14:40:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:06,286 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:06,286 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:06,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2090,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:06,487 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:06,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1360801562, now seen corresponding path program 416 times [2021-05-03 14:40:06,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:06,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182089190] [2021-05-03 14:40:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:06,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182089190] [2021-05-03 14:40:06,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583757838] [2021-05-03 14:40:06,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:06,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:40:06,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:06,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:07,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:07,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:07,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:07,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:07,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:07,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:07,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:07,204 INFO L628 ElimStorePlain]: treesize reduction 36, result has 32.1 percent of original size [2021-05-03 14:40:07,205 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:07,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:40:07,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:40:07,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:07,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:07,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:07,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494584674] [2021-05-03 14:40:07,269 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:07,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:07,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:07,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:07,270 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:08,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:08,198 INFO L93 Difference]: Finished difference Result 177 states and 374 transitions. [2021-05-03 14:40:08,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:40:08,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:08,201 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:40:08,201 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:40:08,201 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 762.6ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:40:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:40:08,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2021-05-03 14:40:08,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:08,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-05-03 14:40:08,203 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-05-03 14:40:08,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:08,203 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-05-03 14:40:08,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:08,203 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-05-03 14:40:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:08,203 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:08,203 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:08,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2100 [2021-05-03 14:40:08,409 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:08,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:08,409 INFO L82 PathProgramCache]: Analyzing trace with hash 574747542, now seen corresponding path program 417 times [2021-05-03 14:40:08,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:08,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668821654] [2021-05-03 14:40:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:08,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668821654] [2021-05-03 14:40:08,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136910001] [2021-05-03 14:40:08,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:08,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:40:08,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:08,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:08,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:09,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:09,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:09,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118984274] [2021-05-03 14:40:09,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:09,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:09,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:09,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:09,172 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:09,399 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 14:40:09,685 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:40:10,088 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:40:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:10,311 INFO L93 Difference]: Finished difference Result 174 states and 360 transitions. [2021-05-03 14:40:10,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:10,314 INFO L225 Difference]: With dead ends: 174 [2021-05-03 14:40:10,314 INFO L226 Difference]: Without dead ends: 171 [2021-05-03 14:40:10,314 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1190.2ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:40:10,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-03 14:40:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2021-05-03 14:40:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1739130434782608) internal successors, (300), 138 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 300 transitions. [2021-05-03 14:40:10,316 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 300 transitions. Word has length 19 [2021-05-03 14:40:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:10,316 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 300 transitions. [2021-05-03 14:40:10,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 300 transitions. [2021-05-03 14:40:10,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:10,316 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:10,316 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:10,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2101,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:10,517 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash 350816074, now seen corresponding path program 418 times [2021-05-03 14:40:10,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:10,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440194470] [2021-05-03 14:40:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:10,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440194470] [2021-05-03 14:40:10,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806840919] [2021-05-03 14:40:10,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:10,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:40:10,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:10,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:10,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:11,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:11,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:11,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:11,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:11,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:11,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:11,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:11,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:11,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:11,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:11,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:11,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:11,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:11,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:40:11,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:11,294 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-05-03 14:40:11,294 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:40:11,295 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:11,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:11,297 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:40:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:11,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:11,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:11,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754448700] [2021-05-03 14:40:11,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:11,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:11,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:11,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:11,434 INFO L87 Difference]: Start difference. First operand 139 states and 300 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:12,732 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-05-03 14:40:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:12,759 INFO L93 Difference]: Finished difference Result 210 states and 434 transitions. [2021-05-03 14:40:12,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:40:12,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:12,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:12,761 INFO L225 Difference]: With dead ends: 210 [2021-05-03 14:40:12,761 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 14:40:12,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1387.1ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:40:12,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 14:40:12,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 139. [2021-05-03 14:40:12,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1739130434782608) internal successors, (300), 138 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 300 transitions. [2021-05-03 14:40:12,763 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 300 transitions. Word has length 19 [2021-05-03 14:40:12,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:12,763 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 300 transitions. [2021-05-03 14:40:12,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 300 transitions. [2021-05-03 14:40:12,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:12,764 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:12,764 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:12,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2111 [2021-05-03 14:40:12,964 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:12,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:12,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1059974758, now seen corresponding path program 419 times [2021-05-03 14:40:12,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:12,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11815038] [2021-05-03 14:40:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:13,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:13,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11815038] [2021-05-03 14:40:13,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617794436] [2021-05-03 14:40:13,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:13,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:40:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:13,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:13,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:13,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:13,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:13,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:13,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:13,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:13,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:13,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:13,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:13,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:40:13,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:13,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:13,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:13,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:13,741 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-05-03 14:40:13,742 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:40:13,742 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:13,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:13,744 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:40:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:13,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:13,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:13,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332802877] [2021-05-03 14:40:13,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:13,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:13,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:13,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:13,849 INFO L87 Difference]: Start difference. First operand 139 states and 300 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:14,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:14,960 INFO L93 Difference]: Finished difference Result 182 states and 383 transitions. [2021-05-03 14:40:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:40:14,960 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:14,960 INFO L225 Difference]: With dead ends: 182 [2021-05-03 14:40:14,960 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:40:14,961 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1189.2ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:40:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:40:14,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2021-05-03 14:40:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1666666666666665) internal successors, (299), 138 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 299 transitions. [2021-05-03 14:40:14,962 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 299 transitions. Word has length 19 [2021-05-03 14:40:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:14,962 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 299 transitions. [2021-05-03 14:40:14,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 299 transitions. [2021-05-03 14:40:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:14,962 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:14,962 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:15,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2121,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:15,163 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:15,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1710932814, now seen corresponding path program 420 times [2021-05-03 14:40:15,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:15,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469005204] [2021-05-03 14:40:15,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:15,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:15,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469005204] [2021-05-03 14:40:15,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676339022] [2021-05-03 14:40:15,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:15,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:40:15,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:15,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:15,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:15,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:15,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:15,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:15,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:15,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:15,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:15,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:15,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:15,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:15,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:15,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:15,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:15,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:15,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:16,013 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 14:40:16,014 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-05-03 14:40:16,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:40:16,024 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:40:16,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:16,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:16,073 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-05-03 14:40:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:16,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:16,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:16,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954225967] [2021-05-03 14:40:16,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:16,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:16,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:16,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:16,226 INFO L87 Difference]: Start difference. First operand 139 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:16,443 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 14:40:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:17,068 INFO L93 Difference]: Finished difference Result 160 states and 341 transitions. [2021-05-03 14:40:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:40:17,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:17,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:17,071 INFO L225 Difference]: With dead ends: 160 [2021-05-03 14:40:17,071 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:40:17,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 979.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:40:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:40:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 133. [2021-05-03 14:40:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-05-03 14:40:17,072 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-05-03 14:40:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:17,072 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-05-03 14:40:17,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-05-03 14:40:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:17,073 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:17,073 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:17,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2132,421 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:17,273 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:17,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1755968046, now seen corresponding path program 421 times [2021-05-03 14:40:17,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:17,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495839770] [2021-05-03 14:40:17,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:17,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:17,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495839770] [2021-05-03 14:40:17,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444141047] [2021-05-03 14:40:17,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:17,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:17,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:17,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:17,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:17,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:40:17,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:17,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:17,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:17,951 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:18,094 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 14:40:18,095 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:40:18,095 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:18,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:40:18,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:18,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:18,154 INFO L518 ElimStorePlain]: Eliminatee v_prenex_336 vanished before elimination [2021-05-03 14:40:18,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:18,157 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:40:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:18,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:18,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:18,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343946258] [2021-05-03 14:40:18,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:18,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:18,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:18,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:18,267 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:18,553 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:40:19,102 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 14:40:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:19,224 INFO L93 Difference]: Finished difference Result 178 states and 368 transitions. [2021-05-03 14:40:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:40:19,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:19,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:19,227 INFO L225 Difference]: With dead ends: 178 [2021-05-03 14:40:19,227 INFO L226 Difference]: Without dead ends: 178 [2021-05-03 14:40:19,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 977.8ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:40:19,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-03 14:40:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 135. [2021-05-03 14:40:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.171641791044776) internal successors, (291), 134 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:19,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 291 transitions. [2021-05-03 14:40:19,228 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 291 transitions. Word has length 19 [2021-05-03 14:40:19,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:19,229 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 291 transitions. [2021-05-03 14:40:19,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:19,229 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 291 transitions. [2021-05-03 14:40:19,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:19,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:19,229 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:19,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2136,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:19,429 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:19,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:19,430 INFO L82 PathProgramCache]: Analyzing trace with hash 254217664, now seen corresponding path program 422 times [2021-05-03 14:40:19,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:19,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691886599] [2021-05-03 14:40:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:19,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691886599] [2021-05-03 14:40:19,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036016922] [2021-05-03 14:40:19,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:19,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:40:19,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:19,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:19,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:19,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:19,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:19,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:19,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:19,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:19,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:19,952 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:20,127 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 14:40:20,128 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-05-03 14:40:20,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:20,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:20,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:20,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:20,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:20,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:40:20,184 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:40:20,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:20,239 INFO L518 ElimStorePlain]: Eliminatee v_prenex_340 vanished before elimination [2021-05-03 14:40:20,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:20,242 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:40:20,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:20,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:20,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:20,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160078198] [2021-05-03 14:40:20,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:20,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:20,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:20,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:20,390 INFO L87 Difference]: Start difference. First operand 135 states and 291 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:21,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:21,480 INFO L93 Difference]: Finished difference Result 227 states and 467 transitions. [2021-05-03 14:40:21,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:40:21,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:21,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:21,483 INFO L225 Difference]: With dead ends: 227 [2021-05-03 14:40:21,483 INFO L226 Difference]: Without dead ends: 227 [2021-05-03 14:40:21,483 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 791.0ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:40:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-03 14:40:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 136. [2021-05-03 14:40:21,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1925925925925926) internal successors, (296), 135 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:21,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 296 transitions. [2021-05-03 14:40:21,484 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 296 transitions. Word has length 19 [2021-05-03 14:40:21,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:21,484 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 296 transitions. [2021-05-03 14:40:21,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:21,485 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 296 transitions. [2021-05-03 14:40:21,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:21,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:21,485 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:21,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2143,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:21,685 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:21,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:21,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1666063996, now seen corresponding path program 423 times [2021-05-03 14:40:21,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:21,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285279560] [2021-05-03 14:40:21,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:21,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285279560] [2021-05-03 14:40:21,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574978907] [2021-05-03 14:40:21,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:21,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:40:21,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:21,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:21,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:22,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:22,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:22,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139157286] [2021-05-03 14:40:22,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:22,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:22,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:22,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:22,296 INFO L87 Difference]: Start difference. First operand 136 states and 296 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:23,094 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:40:23,391 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-05-03 14:40:23,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:23,427 INFO L93 Difference]: Finished difference Result 146 states and 312 transitions. [2021-05-03 14:40:23,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:40:23,430 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:23,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:23,430 INFO L225 Difference]: With dead ends: 146 [2021-05-03 14:40:23,430 INFO L226 Difference]: Without dead ends: 142 [2021-05-03 14:40:23,430 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1008.9ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:40:23,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-03 14:40:23,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2021-05-03 14:40:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.185185185185185) internal successors, (295), 135 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:23,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 295 transitions. [2021-05-03 14:40:23,432 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 295 transitions. Word has length 19 [2021-05-03 14:40:23,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:23,432 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 295 transitions. [2021-05-03 14:40:23,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 295 transitions. [2021-05-03 14:40:23,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:23,432 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:23,432 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:23,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2147,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:23,653 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:23,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1752945230, now seen corresponding path program 424 times [2021-05-03 14:40:23,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:23,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142799521] [2021-05-03 14:40:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:23,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142799521] [2021-05-03 14:40:23,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540664084] [2021-05-03 14:40:23,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:23,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:40:23,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:23,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:23,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:24,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:24,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:24,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:24,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:24,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:24,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:24,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:24,409 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:40:24,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:24,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:40:24,420 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:40:24,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:24,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:40:24,439 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:40:24,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:24,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:24,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:24,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881125602] [2021-05-03 14:40:24,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:24,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:24,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:24,511 INFO L87 Difference]: Start difference. First operand 136 states and 295 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:25,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:25,212 INFO L93 Difference]: Finished difference Result 173 states and 369 transitions. [2021-05-03 14:40:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:40:25,214 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:25,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:25,214 INFO L225 Difference]: With dead ends: 173 [2021-05-03 14:40:25,214 INFO L226 Difference]: Without dead ends: 173 [2021-05-03 14:40:25,214 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:40:25,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-03 14:40:25,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 131. [2021-05-03 14:40:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.169230769230769) internal successors, (282), 130 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 282 transitions. [2021-05-03 14:40:25,216 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 282 transitions. Word has length 19 [2021-05-03 14:40:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:25,216 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 282 transitions. [2021-05-03 14:40:25,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 282 transitions. [2021-05-03 14:40:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:25,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:25,216 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:25,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2153,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:25,421 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash -329141342, now seen corresponding path program 425 times [2021-05-03 14:40:25,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:25,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669278472] [2021-05-03 14:40:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:25,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669278472] [2021-05-03 14:40:25,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876265223] [2021-05-03 14:40:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:25,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:40:25,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:25,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:25,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:26,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:26,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:26,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:26,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:26,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:26,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:40:26,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:26,103 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:40:26,104 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:26,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:40:26,106 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:40:26,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:26,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:26,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:26,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141289188] [2021-05-03 14:40:26,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:26,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:26,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:26,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:26,125 INFO L87 Difference]: Start difference. First operand 131 states and 282 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:26,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:26,778 INFO L93 Difference]: Finished difference Result 165 states and 350 transitions. [2021-05-03 14:40:26,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:26,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:26,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:26,780 INFO L225 Difference]: With dead ends: 165 [2021-05-03 14:40:26,780 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:40:26,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 561.2ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:40:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:40:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 133. [2021-05-03 14:40:26,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:26,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-05-03 14:40:26,782 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-05-03 14:40:26,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:26,782 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-05-03 14:40:26,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:26,782 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-05-03 14:40:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:26,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:26,782 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:26,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2155,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:26,983 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:26,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:26,983 INFO L82 PathProgramCache]: Analyzing trace with hash -689057860, now seen corresponding path program 426 times [2021-05-03 14:40:26,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:26,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170228938] [2021-05-03 14:40:26,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:27,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170228938] [2021-05-03 14:40:27,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588629780] [2021-05-03 14:40:27,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:27,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:40:27,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:27,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:27,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:27,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:27,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:27,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:27,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:27,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:27,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:27,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:27,554 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:27,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:27,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:27,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:27,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:27,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:27,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:27,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:27,692 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 14:40:27,693 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-05-03 14:40:27,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:27,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:40:27,704 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:40:27,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:27,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:27,756 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:40:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:27,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:27,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:27,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900356221] [2021-05-03 14:40:27,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:27,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:27,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:27,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:27,891 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:28,498 INFO L93 Difference]: Finished difference Result 191 states and 402 transitions. [2021-05-03 14:40:28,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:28,501 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:28,501 INFO L225 Difference]: With dead ends: 191 [2021-05-03 14:40:28,501 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:40:28,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 600.1ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:40:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:40:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 134. [2021-05-03 14:40:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-05-03 14:40:28,503 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-05-03 14:40:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:28,503 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-05-03 14:40:28,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:28,503 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-05-03 14:40:28,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:28,503 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:28,503 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:28,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2159 [2021-05-03 14:40:28,704 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:28,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1499125316, now seen corresponding path program 427 times [2021-05-03 14:40:28,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:28,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348787848] [2021-05-03 14:40:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:28,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348787848] [2021-05-03 14:40:28,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909211377] [2021-05-03 14:40:28,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:28,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:28,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:29,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:29,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:29,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:29,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:29,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:29,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:29,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:29,533 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-05-03 14:40:29,534 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:40:29,534 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:29,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:40:29,543 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:29,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:29,601 INFO L518 ElimStorePlain]: Eliminatee v_prenex_342 vanished before elimination [2021-05-03 14:40:29,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:29,604 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:40:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:29,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:29,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:29,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462016150] [2021-05-03 14:40:29,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:29,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:29,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:29,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:29,750 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:30,470 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:40:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:30,651 INFO L93 Difference]: Finished difference Result 170 states and 353 transitions. [2021-05-03 14:40:30,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:40:30,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:30,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:30,654 INFO L225 Difference]: With dead ends: 170 [2021-05-03 14:40:30,654 INFO L226 Difference]: Without dead ends: 170 [2021-05-03 14:40:30,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1160.3ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:40:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-03 14:40:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2021-05-03 14:40:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1703703703703705) internal successors, (293), 135 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:30,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 293 transitions. [2021-05-03 14:40:30,655 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 293 transitions. Word has length 19 [2021-05-03 14:40:30,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:30,655 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 293 transitions. [2021-05-03 14:40:30,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:30,655 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 293 transitions. [2021-05-03 14:40:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:30,655 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:30,655 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:30,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2162,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:30,856 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:30,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:30,856 INFO L82 PathProgramCache]: Analyzing trace with hash -2085794210, now seen corresponding path program 428 times [2021-05-03 14:40:30,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:30,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752042209] [2021-05-03 14:40:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:31,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752042209] [2021-05-03 14:40:31,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989441293] [2021-05-03 14:40:31,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:31,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:40:31,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:31,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:31,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:31,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:31,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:31,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:31,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:31,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:31,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:31,515 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:31,629 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 30 [2021-05-03 14:40:31,630 INFO L628 ElimStorePlain]: treesize reduction 72, result has 39.5 percent of original size [2021-05-03 14:40:31,630 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:31,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:31,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:31,636 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:31,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:31,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:31,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:40:31,680 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:40:31,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:31,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:31,720 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:40:31,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:31,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:31,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:31,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812790138] [2021-05-03 14:40:31,866 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:31,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:31,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:31,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:31,867 INFO L87 Difference]: Start difference. First operand 136 states and 293 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:33,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:33,021 INFO L93 Difference]: Finished difference Result 208 states and 427 transitions. [2021-05-03 14:40:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:40:33,023 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:33,023 INFO L225 Difference]: With dead ends: 208 [2021-05-03 14:40:33,023 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 14:40:33,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1149.8ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:40:33,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 14:40:33,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 137. [2021-05-03 14:40:33,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1911764705882355) internal successors, (298), 136 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 298 transitions. [2021-05-03 14:40:33,029 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 298 transitions. Word has length 19 [2021-05-03 14:40:33,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:33,029 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 298 transitions. [2021-05-03 14:40:33,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:33,029 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 298 transitions. [2021-05-03 14:40:33,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:33,029 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:33,029 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:33,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2169 [2021-05-03 14:40:33,230 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash -23878908, now seen corresponding path program 429 times [2021-05-03 14:40:33,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:33,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40025495] [2021-05-03 14:40:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:33,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:33,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40025495] [2021-05-03 14:40:33,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838810513] [2021-05-03 14:40:33,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:33,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:40:33,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:33,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:33,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:33,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:33,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:33,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363280032] [2021-05-03 14:40:33,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:33,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:33,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:33,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:33,880 INFO L87 Difference]: Start difference. First operand 137 states and 298 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:34,644 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:40:34,855 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-05-03 14:40:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:34,908 INFO L93 Difference]: Finished difference Result 141 states and 302 transitions. [2021-05-03 14:40:34,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:40:34,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:34,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:34,910 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:40:34,910 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:40:34,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1052.6ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:40:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:40:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-05-03 14:40:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1838235294117645) internal successors, (297), 136 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:34,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 297 transitions. [2021-05-03 14:40:34,911 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 297 transitions. Word has length 19 [2021-05-03 14:40:34,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:34,912 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 297 transitions. [2021-05-03 14:40:34,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:34,912 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 297 transitions. [2021-05-03 14:40:34,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:34,912 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:34,912 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:35,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2173,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:35,112 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:35,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash 63002326, now seen corresponding path program 430 times [2021-05-03 14:40:35,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:35,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078609955] [2021-05-03 14:40:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:35,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:35,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078609955] [2021-05-03 14:40:35,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570245417] [2021-05-03 14:40:35,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:35,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:40:35,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:35,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:35,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:35,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:35,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:35,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:35,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:35,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:35,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:35,694 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:35,765 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:40:35,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:40:35,773 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:40:35,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:35,791 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:40:35,791 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:40:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:35,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:35,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:35,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026884584] [2021-05-03 14:40:35,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:35,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:35,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:35,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:35,862 INFO L87 Difference]: Start difference. First operand 137 states and 297 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:36,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:36,666 INFO L93 Difference]: Finished difference Result 163 states and 349 transitions. [2021-05-03 14:40:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:40:36,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:36,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:36,668 INFO L225 Difference]: With dead ends: 163 [2021-05-03 14:40:36,668 INFO L226 Difference]: Without dead ends: 163 [2021-05-03 14:40:36,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 612.0ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:40:36,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-03 14:40:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 134. [2021-05-03 14:40:36,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:36,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-05-03 14:40:36,670 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-05-03 14:40:36,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:36,670 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-05-03 14:40:36,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-05-03 14:40:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:36,670 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:36,670 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:36,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2178 [2021-05-03 14:40:36,871 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:36,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:36,871 INFO L82 PathProgramCache]: Analyzing trace with hash -36741934, now seen corresponding path program 431 times [2021-05-03 14:40:36,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:36,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59250442] [2021-05-03 14:40:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:36,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:37,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59250442] [2021-05-03 14:40:37,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178719679] [2021-05-03 14:40:37,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:37,126 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:40:37,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:37,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:37,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:37,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:37,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:37,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:37,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:37,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:37,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:40:37,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:37,758 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 14:40:37,759 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:40:37,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:40:37,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:37,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:37,820 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:37,820 INFO L518 ElimStorePlain]: Eliminatee v_prenex_348 vanished before elimination [2021-05-03 14:40:37,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:37,822 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:40:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:37,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:37,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:37,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524845432] [2021-05-03 14:40:37,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:37,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:37,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:37,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:37,978 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:38,896 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:40:39,182 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:40:39,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:39,532 INFO L93 Difference]: Finished difference Result 175 states and 362 transitions. [2021-05-03 14:40:39,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:40:39,534 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:39,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:39,534 INFO L225 Difference]: With dead ends: 175 [2021-05-03 14:40:39,535 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 14:40:39,535 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1388.0ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:40:39,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 14:40:39,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2021-05-03 14:40:39,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.176470588235294) internal successors, (296), 136 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:39,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 296 transitions. [2021-05-03 14:40:39,536 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 296 transitions. Word has length 19 [2021-05-03 14:40:39,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:39,536 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 296 transitions. [2021-05-03 14:40:39,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:39,536 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 296 transitions. [2021-05-03 14:40:39,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:39,537 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:39,537 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:39,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2180,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:39,737 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:39,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:39,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1973443776, now seen corresponding path program 432 times [2021-05-03 14:40:39,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:39,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784251630] [2021-05-03 14:40:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:39,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784251630] [2021-05-03 14:40:39,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967633870] [2021-05-03 14:40:39,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:39,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:40:39,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:39,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:39,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:40,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:40,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:40,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:40,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394872038] [2021-05-03 14:40:40,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:40,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:40,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:40,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:40,476 INFO L87 Difference]: Start difference. First operand 137 states and 296 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:41,426 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2021-05-03 14:40:41,683 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 14:40:42,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:42,192 INFO L93 Difference]: Finished difference Result 218 states and 449 transitions. [2021-05-03 14:40:42,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:40:42,194 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:42,194 INFO L225 Difference]: With dead ends: 218 [2021-05-03 14:40:42,194 INFO L226 Difference]: Without dead ends: 218 [2021-05-03 14:40:42,194 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1628.9ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:40:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-03 14:40:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 139. [2021-05-03 14:40:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.2028985507246377) internal successors, (304), 138 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 304 transitions. [2021-05-03 14:40:42,196 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 304 transitions. Word has length 19 [2021-05-03 14:40:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:42,196 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 304 transitions. [2021-05-03 14:40:42,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:42,196 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 304 transitions. [2021-05-03 14:40:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:42,196 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:42,196 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:42,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2187,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:42,397 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:42,397 INFO L82 PathProgramCache]: Analyzing trace with hash -909677188, now seen corresponding path program 433 times [2021-05-03 14:40:42,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:42,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153233485] [2021-05-03 14:40:42,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:42,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:42,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153233485] [2021-05-03 14:40:42,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977797731] [2021-05-03 14:40:42,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:42,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:42,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:43,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:43,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:43,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122073679] [2021-05-03 14:40:43,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:43,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:43,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:43,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:43,173 INFO L87 Difference]: Start difference. First operand 139 states and 304 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:44,036 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:40:44,272 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:40:44,562 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-05-03 14:40:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:44,629 INFO L93 Difference]: Finished difference Result 148 states and 316 transitions. [2021-05-03 14:40:44,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:40:44,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:44,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:44,631 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:40:44,631 INFO L226 Difference]: Without dead ends: 144 [2021-05-03 14:40:44,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1321.2ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:40:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-03 14:40:44,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2021-05-03 14:40:44,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1956521739130435) internal successors, (303), 138 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 303 transitions. [2021-05-03 14:40:44,633 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 303 transitions. Word has length 19 [2021-05-03 14:40:44,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:44,633 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 303 transitions. [2021-05-03 14:40:44,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:44,633 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 303 transitions. [2021-05-03 14:40:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:44,633 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:44,633 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:44,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2197,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:44,834 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash -822795954, now seen corresponding path program 434 times [2021-05-03 14:40:44,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:44,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166379235] [2021-05-03 14:40:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:45,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166379235] [2021-05-03 14:40:45,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706793753] [2021-05-03 14:40:45,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:45,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:40:45,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:45,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:45,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:45,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:45,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:45,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:45,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:45,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:45,658 INFO L628 ElimStorePlain]: treesize reduction 34, result has 30.6 percent of original size [2021-05-03 14:40:45,659 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:45,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:40:45,662 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:40:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:45,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:45,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:45,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345933857] [2021-05-03 14:40:45,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:45,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:45,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:45,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:45,736 INFO L87 Difference]: Start difference. First operand 139 states and 303 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:46,582 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 14:40:47,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:47,037 INFO L93 Difference]: Finished difference Result 181 states and 383 transitions. [2021-05-03 14:40:47,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:40:47,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:47,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:47,038 INFO L225 Difference]: With dead ends: 181 [2021-05-03 14:40:47,038 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:40:47,038 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1273.9ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:40:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:40:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 138. [2021-05-03 14:40:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.197080291970803) internal successors, (301), 137 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:47,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 301 transitions. [2021-05-03 14:40:47,040 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 301 transitions. Word has length 19 [2021-05-03 14:40:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:47,040 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 301 transitions. [2021-05-03 14:40:47,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 301 transitions. [2021-05-03 14:40:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:47,040 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:47,040 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:47,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2202 [2021-05-03 14:40:47,241 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:47,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:47,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1416023454, now seen corresponding path program 435 times [2021-05-03 14:40:47,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:47,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476736579] [2021-05-03 14:40:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:47,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476736579] [2021-05-03 14:40:47,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373126434] [2021-05-03 14:40:47,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:47,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:40:47,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:47,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:47,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:48,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:48,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:48,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862720593] [2021-05-03 14:40:48,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:48,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:48,019 INFO L87 Difference]: Start difference. First operand 138 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:48,649 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:40:48,868 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-05-03 14:40:49,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:49,036 INFO L93 Difference]: Finished difference Result 144 states and 308 transitions. [2021-05-03 14:40:49,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:40:49,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:49,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:49,039 INFO L225 Difference]: With dead ends: 144 [2021-05-03 14:40:49,039 INFO L226 Difference]: Without dead ends: 138 [2021-05-03 14:40:49,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 986.2ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:40:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-03 14:40:49,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2021-05-03 14:40:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.18978102189781) internal successors, (300), 137 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 300 transitions. [2021-05-03 14:40:49,041 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 300 transitions. Word has length 19 [2021-05-03 14:40:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:49,041 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 300 transitions. [2021-05-03 14:40:49,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 300 transitions. [2021-05-03 14:40:49,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:49,041 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:49,041 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:49,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2204,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:49,241 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:49,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1365387222, now seen corresponding path program 436 times [2021-05-03 14:40:49,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:49,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175949142] [2021-05-03 14:40:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:49,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175949142] [2021-05-03 14:40:49,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784526227] [2021-05-03 14:40:49,478 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:49,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:40:49,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:49,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:49,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:49,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:49,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:49,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:49,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:49,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:49,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:49,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:49,983 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:40:49,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:49,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:40:49,994 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:40:50,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:50,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:40:50,015 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:40:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:50,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:50,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:50,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737737689] [2021-05-03 14:40:50,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:50,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:50,087 INFO L87 Difference]: Start difference. First operand 138 states and 300 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:50,601 INFO L93 Difference]: Finished difference Result 165 states and 350 transitions. [2021-05-03 14:40:50,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:40:50,604 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:50,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:50,604 INFO L225 Difference]: With dead ends: 165 [2021-05-03 14:40:50,604 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:40:50,604 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 554.0ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:40:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2021-05-03 14:40:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:50,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-05-03 14:40:50,606 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-05-03 14:40:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:50,606 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-05-03 14:40:50,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-05-03 14:40:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:50,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:50,606 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:50,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2210 [2021-05-03 14:40:50,807 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:50,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:50,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1177763814, now seen corresponding path program 437 times [2021-05-03 14:40:50,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:50,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528270078] [2021-05-03 14:40:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:51,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528270078] [2021-05-03 14:40:51,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986113392] [2021-05-03 14:40:51,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:51,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:40:51,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:51,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:51,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:51,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:51,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:51,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:51,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:51,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:51,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:40:51,481 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:51,527 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:40:51,527 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:51,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:40:51,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:40:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:51,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:51,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:51,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767484895] [2021-05-03 14:40:51,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:51,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:51,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:51,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:51,547 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:52,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:52,120 INFO L93 Difference]: Finished difference Result 169 states and 358 transitions. [2021-05-03 14:40:52,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:40:52,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:52,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:52,124 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:40:52,124 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:40:52,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 606.8ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:40:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:40:52,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 137. [2021-05-03 14:40:52,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.161764705882353) internal successors, (294), 136 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:52,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 294 transitions. [2021-05-03 14:40:52,126 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 294 transitions. Word has length 19 [2021-05-03 14:40:52,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:52,126 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 294 transitions. [2021-05-03 14:40:52,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:52,126 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 294 transitions. [2021-05-03 14:40:52,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:52,126 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:52,126 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:52,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2212 [2021-05-03 14:40:52,327 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:52,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:52,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1537680332, now seen corresponding path program 438 times [2021-05-03 14:40:52,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:52,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125999110] [2021-05-03 14:40:52,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:52,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125999110] [2021-05-03 14:40:52,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738876675] [2021-05-03 14:40:52,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:52,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:40:52,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:52,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:52,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:52,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:52,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:52,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:40:52,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:52,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:52,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:52,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:52,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:52,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:52,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:52,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:52,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:52,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:52,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:40:52,997 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:53,112 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-05-03 14:40:53,114 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:40:53,114 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:53,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:53,116 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:40:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:53,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:53,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:53,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022549652] [2021-05-03 14:40:53,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:53,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:53,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:53,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:53,243 INFO L87 Difference]: Start difference. First operand 137 states and 294 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:54,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:54,110 INFO L93 Difference]: Finished difference Result 192 states and 405 transitions. [2021-05-03 14:40:54,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:54,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:54,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:54,113 INFO L225 Difference]: With dead ends: 192 [2021-05-03 14:40:54,113 INFO L226 Difference]: Without dead ends: 192 [2021-05-03 14:40:54,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 707.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:40:54,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-03 14:40:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 138. [2021-05-03 14:40:54,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1605839416058394) internal successors, (296), 137 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:54,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 296 transitions. [2021-05-03 14:40:54,115 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 296 transitions. Word has length 19 [2021-05-03 14:40:54,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:54,115 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 296 transitions. [2021-05-03 14:40:54,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:54,115 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 296 transitions. [2021-05-03 14:40:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:54,115 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:54,115 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:54,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2216,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:54,316 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash -827632562, now seen corresponding path program 439 times [2021-05-03 14:40:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:54,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557782814] [2021-05-03 14:40:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:54,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557782814] [2021-05-03 14:40:54,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852592656] [2021-05-03 14:40:54,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:54,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:54,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:54,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:55,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:55,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:55,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:55,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151000221] [2021-05-03 14:40:55,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:55,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:55,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:55,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:55,045 INFO L87 Difference]: Start difference. First operand 138 states and 296 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:55,665 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:40:55,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:55,764 INFO L93 Difference]: Finished difference Result 154 states and 328 transitions. [2021-05-03 14:40:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:55,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:55,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:55,766 INFO L225 Difference]: With dead ends: 154 [2021-05-03 14:40:55,766 INFO L226 Difference]: Without dead ends: 154 [2021-05-03 14:40:55,767 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 785.3ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:40:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-03 14:40:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2021-05-03 14:40:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.162962962962963) internal successors, (292), 135 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 292 transitions. [2021-05-03 14:40:55,768 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 292 transitions. Word has length 19 [2021-05-03 14:40:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:55,768 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 292 transitions. [2021-05-03 14:40:55,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 292 transitions. [2021-05-03 14:40:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:55,768 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:55,768 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:55,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2226,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:55,969 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:55,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:55,969 INFO L82 PathProgramCache]: Analyzing trace with hash 650502844, now seen corresponding path program 440 times [2021-05-03 14:40:55,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:55,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481332062] [2021-05-03 14:40:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:56,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481332062] [2021-05-03 14:40:56,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448032607] [2021-05-03 14:40:56,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:56,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:40:56,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:56,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:40:56,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:56,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:56,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:56,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:40:56,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:56,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:56,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:56,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:56,908 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-03 14:40:56,909 INFO L628 ElimStorePlain]: treesize reduction 80, result has 38.9 percent of original size [2021-05-03 14:40:56,909 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:40:56,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:56,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:40:56,931 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:40:56,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:57,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:40:57,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:40:57,008 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:40:57,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:40:57,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:40:57,068 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:40:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:57,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:57,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:40:57,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315503508] [2021-05-03 14:40:57,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:40:57,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:57,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:40:57,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:40:57,230 INFO L87 Difference]: Start difference. First operand 136 states and 292 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:57,435 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-05-03 14:40:57,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:57,840 INFO L93 Difference]: Finished difference Result 172 states and 357 transitions. [2021-05-03 14:40:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:57,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:57,843 INFO L225 Difference]: With dead ends: 172 [2021-05-03 14:40:57,843 INFO L226 Difference]: Without dead ends: 172 [2021-05-03 14:40:57,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 880.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:40:57,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-03 14:40:57,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 138. [2021-05-03 14:40:57,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.167883211678832) internal successors, (297), 137 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:57,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 297 transitions. [2021-05-03 14:40:57,845 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 297 transitions. Word has length 19 [2021-05-03 14:40:57,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:57,845 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 297 transitions. [2021-05-03 14:40:57,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:57,845 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 297 transitions. [2021-05-03 14:40:57,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:57,845 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:57,845 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:40:58,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2236 [2021-05-03 14:40:58,045 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:40:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:40:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1360550614, now seen corresponding path program 441 times [2021-05-03 14:40:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:40:58,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514491532] [2021-05-03 14:40:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:40:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:40:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:58,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514491532] [2021-05-03 14:40:58,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350345663] [2021-05-03 14:40:58,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:40:58,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:40:58,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:40:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:40:58,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:40:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:40:58,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:40:58,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:40:58,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555734020] [2021-05-03 14:40:58,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:40:58,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:40:58,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:40:58,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:40:58,885 INFO L87 Difference]: Start difference. First operand 138 states and 297 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:59,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:40:59,892 INFO L93 Difference]: Finished difference Result 199 states and 408 transitions. [2021-05-03 14:40:59,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:40:59,894 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:40:59,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:40:59,894 INFO L225 Difference]: With dead ends: 199 [2021-05-03 14:40:59,894 INFO L226 Difference]: Without dead ends: 199 [2021-05-03 14:40:59,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 928.5ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:40:59,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-03 14:40:59,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 139. [2021-05-03 14:40:59,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1884057971014492) internal successors, (302), 138 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 302 transitions. [2021-05-03 14:40:59,895 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 302 transitions. Word has length 19 [2021-05-03 14:40:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:40:59,896 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 302 transitions. [2021-05-03 14:40:59,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:40:59,896 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 302 transitions. [2021-05-03 14:40:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:40:59,896 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:40:59,896 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:00,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2240,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:00,096 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash -872501380, now seen corresponding path program 442 times [2021-05-03 14:41:00,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:00,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801973073] [2021-05-03 14:41:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:00,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:00,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801973073] [2021-05-03 14:41:00,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614771239] [2021-05-03 14:41:00,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:00,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:41:00,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:00,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:00,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:00,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:00,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:00,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512231989] [2021-05-03 14:41:00,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:00,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:00,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:00,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:00,831 INFO L87 Difference]: Start difference. First operand 139 states and 302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:01,600 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:41:01,883 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-05-03 14:41:01,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:01,946 INFO L93 Difference]: Finished difference Result 143 states and 306 transitions. [2021-05-03 14:41:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:41:01,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:01,949 INFO L225 Difference]: With dead ends: 143 [2021-05-03 14:41:01,949 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:41:01,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1083.9ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:41:01,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:41:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-03 14:41:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.181159420289855) internal successors, (301), 138 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:01,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 301 transitions. [2021-05-03 14:41:01,950 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 301 transitions. Word has length 19 [2021-05-03 14:41:01,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:01,950 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 301 transitions. [2021-05-03 14:41:01,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 301 transitions. [2021-05-03 14:41:01,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:01,950 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:01,951 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:02,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2250,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:02,151 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:02,151 INFO L82 PathProgramCache]: Analyzing trace with hash -785620146, now seen corresponding path program 443 times [2021-05-03 14:41:02,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:02,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777974270] [2021-05-03 14:41:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:02,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777974270] [2021-05-03 14:41:02,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067616051] [2021-05-03 14:41:02,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:02,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:41:02,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:02,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:02,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:02,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:02,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481756734] [2021-05-03 14:41:02,722 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:02,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:02,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:02,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:02,722 INFO L87 Difference]: Start difference. First operand 139 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:03,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:03,480 INFO L93 Difference]: Finished difference Result 161 states and 343 transitions. [2021-05-03 14:41:03,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:41:03,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:03,483 INFO L225 Difference]: With dead ends: 161 [2021-05-03 14:41:03,483 INFO L226 Difference]: Without dead ends: 161 [2021-05-03 14:41:03,484 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 582.2ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:41:03,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-05-03 14:41:03,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 135. [2021-05-03 14:41:03,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-05-03 14:41:03,485 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-05-03 14:41:03,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:03,485 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-05-03 14:41:03,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-05-03 14:41:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:03,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:03,485 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:03,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 444 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2255 [2021-05-03 14:41:03,686 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:03,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:03,686 INFO L82 PathProgramCache]: Analyzing trace with hash -235295436, now seen corresponding path program 444 times [2021-05-03 14:41:03,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:03,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802948606] [2021-05-03 14:41:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:03,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:03,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802948606] [2021-05-03 14:41:03,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237927372] [2021-05-03 14:41:03,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:04,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:41:04,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:04,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:04,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:04,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:04,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:04,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:04,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:41:04,519 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:04,707 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-05-03 14:41:04,707 INFO L628 ElimStorePlain]: treesize reduction 86, result has 34.4 percent of original size [2021-05-03 14:41:04,708 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:41:04,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:41:04,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:04,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:41:04,777 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-05-03 14:41:04,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:41:04,780 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:41:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:04,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:04,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:41:04,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786675300] [2021-05-03 14:41:04,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:41:04,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:04,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:41:04,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:04,948 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:05,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:05,917 INFO L93 Difference]: Finished difference Result 177 states and 368 transitions. [2021-05-03 14:41:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:41:05,920 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:05,921 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:41:05,921 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:41:05,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1058.7ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:41:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:41:05,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 138. [2021-05-03 14:41:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1751824817518246) internal successors, (298), 137 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 298 transitions. [2021-05-03 14:41:05,922 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 298 transitions. Word has length 19 [2021-05-03 14:41:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:05,922 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 298 transitions. [2021-05-03 14:41:05,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 298 transitions. [2021-05-03 14:41:05,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:05,923 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:05,923 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:06,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2259 [2021-05-03 14:41:06,123 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:06,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:06,123 INFO L82 PathProgramCache]: Analyzing trace with hash 474752334, now seen corresponding path program 445 times [2021-05-03 14:41:06,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:06,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528955204] [2021-05-03 14:41:06,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:06,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528955204] [2021-05-03 14:41:06,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749488408] [2021-05-03 14:41:06,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:06,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:06,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:06,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:07,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:07,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:07,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765727380] [2021-05-03 14:41:07,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:07,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:07,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:07,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:07,091 INFO L87 Difference]: Start difference. First operand 138 states and 298 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:07,463 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-03 14:41:08,031 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:41:08,327 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:41:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:08,595 INFO L93 Difference]: Finished difference Result 216 states and 442 transitions. [2021-05-03 14:41:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:41:08,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:08,597 INFO L225 Difference]: With dead ends: 216 [2021-05-03 14:41:08,597 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 14:41:08,598 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1650.7ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:41:08,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 14:41:08,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 140. [2021-05-03 14:41:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.2014388489208634) internal successors, (306), 139 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:08,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 306 transitions. [2021-05-03 14:41:08,599 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 306 transitions. Word has length 19 [2021-05-03 14:41:08,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:08,599 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 306 transitions. [2021-05-03 14:41:08,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 306 transitions. [2021-05-03 14:41:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:08,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:08,600 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:08,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2265 [2021-05-03 14:41:08,800 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:08,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:08,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1758299660, now seen corresponding path program 446 times [2021-05-03 14:41:08,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:08,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123424350] [2021-05-03 14:41:08,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:09,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:09,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123424350] [2021-05-03 14:41:09,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674699953] [2021-05-03 14:41:09,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:09,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:41:09,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:09,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:09,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:09,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:09,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:09,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329488667] [2021-05-03 14:41:09,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:09,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:09,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:09,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:09,688 INFO L87 Difference]: Start difference. First operand 140 states and 306 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:10,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:10,564 INFO L93 Difference]: Finished difference Result 148 states and 316 transitions. [2021-05-03 14:41:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:41:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:10,567 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:41:10,567 INFO L226 Difference]: Without dead ends: 144 [2021-05-03 14:41:10,567 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1130.6ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:41:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-03 14:41:10,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2021-05-03 14:41:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.194244604316547) internal successors, (305), 139 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 305 transitions. [2021-05-03 14:41:10,569 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 305 transitions. Word has length 19 [2021-05-03 14:41:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:10,569 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 305 transitions. [2021-05-03 14:41:10,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 305 transitions. [2021-05-03 14:41:10,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:10,569 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:10,569 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:10,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2275,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:10,770 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:10,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:10,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1671418426, now seen corresponding path program 447 times [2021-05-03 14:41:10,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:10,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050241115] [2021-05-03 14:41:10,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:11,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050241115] [2021-05-03 14:41:11,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446809886] [2021-05-03 14:41:11,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:11,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:41:11,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:11,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:11,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:11,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985640700] [2021-05-03 14:41:11,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:11,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:11,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:11,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:11,449 INFO L87 Difference]: Start difference. First operand 140 states and 305 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:12,179 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:41:12,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:12,748 INFO L93 Difference]: Finished difference Result 175 states and 371 transitions. [2021-05-03 14:41:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:41:12,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:12,750 INFO L225 Difference]: With dead ends: 175 [2021-05-03 14:41:12,750 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 14:41:12,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1391.4ms TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:41:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 14:41:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 139. [2021-05-03 14:41:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1956521739130435) internal successors, (303), 138 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 303 transitions. [2021-05-03 14:41:12,752 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 303 transitions. Word has length 19 [2021-05-03 14:41:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:12,752 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 303 transitions. [2021-05-03 14:41:12,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:12,752 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 303 transitions. [2021-05-03 14:41:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:12,752 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:12,752 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:12,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2279 [2021-05-03 14:41:12,953 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:12,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2030321370, now seen corresponding path program 448 times [2021-05-03 14:41:12,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:12,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681753888] [2021-05-03 14:41:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:13,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:13,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681753888] [2021-05-03 14:41:13,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220998175] [2021-05-03 14:41:13,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:13,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:41:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:13,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:13,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:13,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:13,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:13,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454150106] [2021-05-03 14:41:13,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:13,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:13,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:13,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:13,717 INFO L87 Difference]: Start difference. First operand 139 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:14,240 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:41:14,485 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 14:41:14,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:14,576 INFO L93 Difference]: Finished difference Result 145 states and 310 transitions. [2021-05-03 14:41:14,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:41:14,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:14,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:14,579 INFO L225 Difference]: With dead ends: 145 [2021-05-03 14:41:14,579 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:41:14,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 992.0ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:41:14,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:41:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-03 14:41:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1884057971014492) internal successors, (302), 138 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:14,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 302 transitions. [2021-05-03 14:41:14,580 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 302 transitions. Word has length 19 [2021-05-03 14:41:14,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:14,580 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 302 transitions. [2021-05-03 14:41:14,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:14,580 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 302 transitions. [2021-05-03 14:41:14,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:14,581 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:14,581 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:14,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2283,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:14,781 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:14,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:14,782 INFO L82 PathProgramCache]: Analyzing trace with hash 516764750, now seen corresponding path program 449 times [2021-05-03 14:41:14,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:14,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069188985] [2021-05-03 14:41:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:15,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:15,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069188985] [2021-05-03 14:41:15,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608498978] [2021-05-03 14:41:15,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:15,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:41:15,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:15,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:15,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:15,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:15,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:15,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509126106] [2021-05-03 14:41:15,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:15,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:15,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:15,534 INFO L87 Difference]: Start difference. First operand 139 states and 302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:16,293 INFO L93 Difference]: Finished difference Result 166 states and 352 transitions. [2021-05-03 14:41:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:41:16,295 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:16,296 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:41:16,296 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 14:41:16,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:16,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 14:41:16,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 134. [2021-05-03 14:41:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-05-03 14:41:16,297 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-05-03 14:41:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:16,297 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-05-03 14:41:16,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-05-03 14:41:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:16,298 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:16,298 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:16,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2288,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:16,498 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:16,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1719659986, now seen corresponding path program 450 times [2021-05-03 14:41:16,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:16,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498877834] [2021-05-03 14:41:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:16,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498877834] [2021-05-03 14:41:16,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630790230] [2021-05-03 14:41:16,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:16,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:41:16,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:16,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:16,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:17,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:17,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:17,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:17,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:17,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:17,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:41:17,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:17,623 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-05-03 14:41:17,624 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:41:17,624 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:41:17,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:41:17,632 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:17,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:41:17,669 INFO L518 ElimStorePlain]: Eliminatee v_prenex_364 vanished before elimination [2021-05-03 14:41:17,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:41:17,671 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:41:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:17,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:17,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894532674] [2021-05-03 14:41:17,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:17,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:17,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:17,784 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:18,650 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:41:18,927 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-05-03 14:41:19,269 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:41:19,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:19,485 INFO L93 Difference]: Finished difference Result 174 states and 360 transitions. [2021-05-03 14:41:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:41:19,487 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:19,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:19,487 INFO L225 Difference]: With dead ends: 174 [2021-05-03 14:41:19,487 INFO L226 Difference]: Without dead ends: 174 [2021-05-03 14:41:19,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1639.5ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:41:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-03 14:41:19,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 138. [2021-05-03 14:41:19,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.1824817518248176) internal successors, (299), 137 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 299 transitions. [2021-05-03 14:41:19,489 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 299 transitions. Word has length 19 [2021-05-03 14:41:19,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:19,489 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 299 transitions. [2021-05-03 14:41:19,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:19,489 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 299 transitions. [2021-05-03 14:41:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:19,489 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:19,489 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:19,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2292,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:19,690 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:19,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:19,690 INFO L82 PathProgramCache]: Analyzing trace with hash -565121600, now seen corresponding path program 451 times [2021-05-03 14:41:19,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:19,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617195491] [2021-05-03 14:41:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:19,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617195491] [2021-05-03 14:41:19,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501120935] [2021-05-03 14:41:19,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:19,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:19,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:20,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:20,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:41:20,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686889092] [2021-05-03 14:41:20,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:41:20,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:20,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:41:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:20,731 INFO L87 Difference]: Start difference. First operand 138 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:21,148 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-03 14:41:21,553 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-05-03 14:41:21,959 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 14:41:22,178 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-03 14:41:22,424 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 14:41:22,592 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:41:22,750 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2021-05-03 14:41:23,197 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2021-05-03 14:41:23,420 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 14:41:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:23,526 INFO L93 Difference]: Finished difference Result 210 states and 431 transitions. [2021-05-03 14:41:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:41:23,528 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:23,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:23,529 INFO L225 Difference]: With dead ends: 210 [2021-05-03 14:41:23,529 INFO L226 Difference]: Without dead ends: 210 [2021-05-03 14:41:23,529 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2530.6ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:41:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-03 14:41:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 141. [2021-05-03 14:41:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2142857142857144) internal successors, (310), 140 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 310 transitions. [2021-05-03 14:41:23,530 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 310 transitions. Word has length 19 [2021-05-03 14:41:23,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:23,531 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 310 transitions. [2021-05-03 14:41:23,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 310 transitions. [2021-05-03 14:41:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:23,531 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:23,531 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:23,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2299 [2021-05-03 14:41:23,731 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:23,732 INFO L82 PathProgramCache]: Analyzing trace with hash 846724732, now seen corresponding path program 452 times [2021-05-03 14:41:23,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:23,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107288153] [2021-05-03 14:41:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:24,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107288153] [2021-05-03 14:41:24,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774698580] [2021-05-03 14:41:24,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:24,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:41:24,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:24,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:24,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:24,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:24,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664349774] [2021-05-03 14:41:24,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:24,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:24,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:24,733 INFO L87 Difference]: Start difference. First operand 141 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:25,066 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:41:25,269 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:41:25,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:25,860 INFO L93 Difference]: Finished difference Result 152 states and 325 transitions. [2021-05-03 14:41:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:41:25,863 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:25,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:25,863 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:41:25,863 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:41:25,863 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1179.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:41:25,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:41:25,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2021-05-03 14:41:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2071428571428573) internal successors, (309), 140 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:25,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 309 transitions. [2021-05-03 14:41:25,865 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 309 transitions. Word has length 19 [2021-05-03 14:41:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:25,865 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 309 transitions. [2021-05-03 14:41:25,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 309 transitions. [2021-05-03 14:41:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:25,865 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:25,865 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:26,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 453 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2311 [2021-05-03 14:41:26,066 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:26,066 INFO L82 PathProgramCache]: Analyzing trace with hash 933605966, now seen corresponding path program 453 times [2021-05-03 14:41:26,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:26,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074525371] [2021-05-03 14:41:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:26,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:26,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074525371] [2021-05-03 14:41:26,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884513636] [2021-05-03 14:41:26,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:26,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:41:26,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:26,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:26,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:26,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:26,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:41:26,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172730621] [2021-05-03 14:41:26,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:41:26,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:26,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:41:26,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:26,911 INFO L87 Difference]: Start difference. First operand 141 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:27,671 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-03 14:41:28,044 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:41:28,252 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2021-05-03 14:41:28,672 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:41:28,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:28,854 INFO L93 Difference]: Finished difference Result 183 states and 387 transitions. [2021-05-03 14:41:28,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:41:28,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:28,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:28,856 INFO L225 Difference]: With dead ends: 183 [2021-05-03 14:41:28,856 INFO L226 Difference]: Without dead ends: 183 [2021-05-03 14:41:28,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1733.5ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:41:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-03 14:41:28,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2021-05-03 14:41:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.20863309352518) internal successors, (307), 139 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 307 transitions. [2021-05-03 14:41:28,858 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 307 transitions. Word has length 19 [2021-05-03 14:41:28,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:28,858 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 307 transitions. [2021-05-03 14:41:28,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:28,859 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 307 transitions. [2021-05-03 14:41:28,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:28,859 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:28,859 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:29,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2315 [2021-05-03 14:41:29,077 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:29,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:29,077 INFO L82 PathProgramCache]: Analyzing trace with hash 340378466, now seen corresponding path program 454 times [2021-05-03 14:41:29,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:29,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864321178] [2021-05-03 14:41:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:29,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:29,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864321178] [2021-05-03 14:41:29,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533337980] [2021-05-03 14:41:29,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:29,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:41:29,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:29,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:29,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:30,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:30,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:30,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:30,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855013734] [2021-05-03 14:41:30,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:30,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:30,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:30,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:30,046 INFO L87 Difference]: Start difference. First operand 140 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:30,578 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-05-03 14:41:30,837 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-05-03 14:41:31,173 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2021-05-03 14:41:31,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:31,346 INFO L93 Difference]: Finished difference Result 150 states and 320 transitions. [2021-05-03 14:41:31,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:41:31,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:31,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:31,349 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:41:31,349 INFO L226 Difference]: Without dead ends: 144 [2021-05-03 14:41:31,349 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1476.1ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:41:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-03 14:41:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2021-05-03 14:41:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.2014388489208634) internal successors, (306), 139 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:31,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 306 transitions. [2021-05-03 14:41:31,350 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 306 transitions. Word has length 19 [2021-05-03 14:41:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:31,351 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 306 transitions. [2021-05-03 14:41:31,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:31,351 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 306 transitions. [2021-05-03 14:41:31,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:31,351 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:31,351 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:31,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2319 [2021-05-03 14:41:31,551 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:31,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1173178154, now seen corresponding path program 455 times [2021-05-03 14:41:31,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:31,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156628878] [2021-05-03 14:41:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:31,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156628878] [2021-05-03 14:41:31,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041903340] [2021-05-03 14:41:31,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:31,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:41:31,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:31,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:32,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:32,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:41:32,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867218454] [2021-05-03 14:41:32,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:41:32,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:32,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:41:32,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:32,335 INFO L87 Difference]: Start difference. First operand 140 states and 306 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:32,760 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:41:32,954 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 14:41:33,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:33,589 INFO L93 Difference]: Finished difference Result 176 states and 374 transitions. [2021-05-03 14:41:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:41:33,592 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:33,593 INFO L225 Difference]: With dead ends: 176 [2021-05-03 14:41:33,593 INFO L226 Difference]: Without dead ends: 176 [2021-05-03 14:41:33,593 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1287.6ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:41:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-03 14:41:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 139. [2021-05-03 14:41:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.2028985507246377) internal successors, (304), 138 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:33,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 304 transitions. [2021-05-03 14:41:33,594 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 304 transitions. Word has length 19 [2021-05-03 14:41:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:33,594 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 304 transitions. [2021-05-03 14:41:33,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 304 transitions. [2021-05-03 14:41:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:33,595 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:33,595 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:33,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2324 [2021-05-03 14:41:33,795 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:33,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:33,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1823513404, now seen corresponding path program 456 times [2021-05-03 14:41:33,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:33,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416967418] [2021-05-03 14:41:33,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:34,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416967418] [2021-05-03 14:41:34,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359262415] [2021-05-03 14:41:34,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:34,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:41:34,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:34,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:34,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:34,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:34,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:34,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432205651] [2021-05-03 14:41:34,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:34,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:34,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:34,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:34,619 INFO L87 Difference]: Start difference. First operand 139 states and 304 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:35,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:35,431 INFO L93 Difference]: Finished difference Result 147 states and 314 transitions. [2021-05-03 14:41:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:41:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:35,435 INFO L225 Difference]: With dead ends: 147 [2021-05-03 14:41:35,435 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:41:35,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 896.5ms TimeCoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:41:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:41:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-05-03 14:41:35,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1956521739130435) internal successors, (303), 138 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 303 transitions. [2021-05-03 14:41:35,436 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 303 transitions. Word has length 19 [2021-05-03 14:41:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:35,436 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 303 transitions. [2021-05-03 14:41:35,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 303 transitions. [2021-05-03 14:41:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:35,437 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:35,437 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:35,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2328 [2021-05-03 14:41:35,637 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:35,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash -2058976434, now seen corresponding path program 457 times [2021-05-03 14:41:35,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:35,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593561906] [2021-05-03 14:41:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:35,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593561906] [2021-05-03 14:41:35,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751153108] [2021-05-03 14:41:35,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:35,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:35,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:36,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:36,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:36,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:36,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:36,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:36,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:36,445 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:36,520 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:41:36,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:36,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:41:36,531 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:41:36,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:41:36,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:41:36,552 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:41:36,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:36,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:36,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:41:36,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082343642] [2021-05-03 14:41:36,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:41:36,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:36,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:41:36,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:36,638 INFO L87 Difference]: Start difference. First operand 139 states and 303 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:37,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:37,334 INFO L93 Difference]: Finished difference Result 156 states and 332 transitions. [2021-05-03 14:41:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:41:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:37,337 INFO L225 Difference]: With dead ends: 156 [2021-05-03 14:41:37,337 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:41:37,337 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 662.4ms TimeCoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:41:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:41:37,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 133. [2021-05-03 14:41:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:37,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-05-03 14:41:37,339 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-05-03 14:41:37,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:37,339 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-05-03 14:41:37,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:37,339 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-05-03 14:41:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:37,339 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:37,339 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:37,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2332 [2021-05-03 14:41:37,539 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:37,540 INFO L82 PathProgramCache]: Analyzing trace with hash -27202426, now seen corresponding path program 458 times [2021-05-03 14:41:37,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:37,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172166669] [2021-05-03 14:41:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:37,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172166669] [2021-05-03 14:41:37,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072987692] [2021-05-03 14:41:37,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:37,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:41:37,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:37,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:38,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:38,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:38,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:38,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:38,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:38,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:38,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:38,162 INFO L628 ElimStorePlain]: treesize reduction 38, result has 30.9 percent of original size [2021-05-03 14:41:38,162 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:41:38,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:41:38,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:9 [2021-05-03 14:41:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:38,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:38,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:38,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655659691] [2021-05-03 14:41:38,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:38,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:38,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:38,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:38,240 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:39,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:39,344 INFO L93 Difference]: Finished difference Result 177 states and 374 transitions. [2021-05-03 14:41:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:41:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:39,347 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:41:39,347 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:41:39,347 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 748.5ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:41:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:41:39,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 133. [2021-05-03 14:41:39,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:39,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-05-03 14:41:39,348 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-05-03 14:41:39,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:39,348 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-05-03 14:41:39,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:39,349 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-05-03 14:41:39,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:39,349 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:39,349 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:39,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2334,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:39,549 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:39,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:39,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1271981482, now seen corresponding path program 459 times [2021-05-03 14:41:39,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:39,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831986452] [2021-05-03 14:41:39,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:39,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831986452] [2021-05-03 14:41:39,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952692585] [2021-05-03 14:41:39,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:39,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:41:39,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:39,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:39,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:40,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:40,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:40,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:41:40,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:40,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:40,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:41:40,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:40,337 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:41:40,337 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:41:40,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:41:40,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:41:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:40,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:40,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:41:40,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434667928] [2021-05-03 14:41:40,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:41:40,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:40,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:41:40,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:41:40,351 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:41,996 INFO L93 Difference]: Finished difference Result 189 states and 398 transitions. [2021-05-03 14:41:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:41:41,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:41,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:41,998 INFO L225 Difference]: With dead ends: 189 [2021-05-03 14:41:41,998 INFO L226 Difference]: Without dead ends: 189 [2021-05-03 14:41:41,999 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1449.5ms TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:41:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-03 14:41:42,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 134. [2021-05-03 14:41:42,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1654135338345863) internal successors, (288), 133 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:42,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 288 transitions. [2021-05-03 14:41:42,000 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 288 transitions. Word has length 19 [2021-05-03 14:41:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:42,000 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 288 transitions. [2021-05-03 14:41:42,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 288 transitions. [2021-05-03 14:41:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:42,000 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:42,000 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:42,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2335,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:42,201 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1631898000, now seen corresponding path program 460 times [2021-05-03 14:41:42,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:42,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063243410] [2021-05-03 14:41:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:42,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:42,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063243410] [2021-05-03 14:41:42,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568068266] [2021-05-03 14:41:42,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:42,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:41:42,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:42,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:42,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:42,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:42,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:42,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:42,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:42,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:42,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:41:42,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:42,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:42,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:42,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:42,840 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:42,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:42,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:41:42,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:43,023 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2021-05-03 14:41:43,024 INFO L628 ElimStorePlain]: treesize reduction 73, result has 38.7 percent of original size [2021-05-03 14:41:43,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:43,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:41:43,036 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:41:43,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:41:43,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:41:43,095 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:41:43,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:43,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:43,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:43,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62388556] [2021-05-03 14:41:43,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:43,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:43,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:43,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:43,270 INFO L87 Difference]: Start difference. First operand 134 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:43,714 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 22 [2021-05-03 14:41:44,577 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:41:44,742 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-05-03 14:41:44,945 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 26 [2021-05-03 14:41:45,093 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:41:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:45,502 INFO L93 Difference]: Finished difference Result 204 states and 429 transitions. [2021-05-03 14:41:45,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:41:45,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:45,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:45,505 INFO L225 Difference]: With dead ends: 204 [2021-05-03 14:41:45,505 INFO L226 Difference]: Without dead ends: 204 [2021-05-03 14:41:45,505 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2119.3ms TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:41:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-03 14:41:45,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 135. [2021-05-03 14:41:45,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1641791044776117) internal successors, (290), 134 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 290 transitions. [2021-05-03 14:41:45,507 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 290 transitions. Word has length 19 [2021-05-03 14:41:45,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:45,507 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 290 transitions. [2021-05-03 14:41:45,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:45,507 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 290 transitions. [2021-05-03 14:41:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:45,507 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:45,507 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:45,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2339 [2021-05-03 14:41:45,708 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:45,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:45,708 INFO L82 PathProgramCache]: Analyzing trace with hash -921850230, now seen corresponding path program 461 times [2021-05-03 14:41:45,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:45,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691816779] [2021-05-03 14:41:45,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:46,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691816779] [2021-05-03 14:41:46,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67871888] [2021-05-03 14:41:46,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:46,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:41:46,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:46,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:46,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:46,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:46,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:41:46,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431167655] [2021-05-03 14:41:46,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:41:46,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:46,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:41:46,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:41:46,632 INFO L87 Difference]: Start difference. First operand 135 states and 290 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:46,940 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 14:41:47,429 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:41:47,749 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-05-03 14:41:48,096 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:41:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:48,238 INFO L93 Difference]: Finished difference Result 160 states and 341 transitions. [2021-05-03 14:41:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:41:48,241 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:48,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:48,241 INFO L225 Difference]: With dead ends: 160 [2021-05-03 14:41:48,241 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:41:48,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1630.3ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:41:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:41:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2021-05-03 14:41:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.16793893129771) internal successors, (284), 131 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:48,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 284 transitions. [2021-05-03 14:41:48,243 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 284 transitions. Word has length 19 [2021-05-03 14:41:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:48,243 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 284 transitions. [2021-05-03 14:41:48,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:48,243 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 284 transitions. [2021-05-03 14:41:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:48,243 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:48,243 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:48,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2342 [2021-05-03 14:41:48,444 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:48,444 INFO L82 PathProgramCache]: Analyzing trace with hash 489128450, now seen corresponding path program 462 times [2021-05-03 14:41:48,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:48,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008437061] [2021-05-03 14:41:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:48,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:48,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008437061] [2021-05-03 14:41:48,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300085345] [2021-05-03 14:41:48,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:48,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:41:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:49,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:49,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:41:49,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995662243] [2021-05-03 14:41:49,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:41:49,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:49,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:41:49,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:41:49,213 INFO L87 Difference]: Start difference. First operand 132 states and 284 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:49,465 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 14:41:49,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:49,988 INFO L93 Difference]: Finished difference Result 143 states and 301 transitions. [2021-05-03 14:41:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:41:49,991 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:49,991 INFO L225 Difference]: With dead ends: 143 [2021-05-03 14:41:49,991 INFO L226 Difference]: Without dead ends: 137 [2021-05-03 14:41:49,991 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 931.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:41:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-05-03 14:41:49,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2021-05-03 14:41:49,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 283 transitions. [2021-05-03 14:41:49,992 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 283 transitions. Word has length 19 [2021-05-03 14:41:49,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:49,993 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 283 transitions. [2021-05-03 14:41:49,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:49,993 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 283 transitions. [2021-05-03 14:41:49,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:49,993 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:49,993 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:50,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2352,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:50,193 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:50,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:50,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2137187534, now seen corresponding path program 463 times [2021-05-03 14:41:50,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:50,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992902181] [2021-05-03 14:41:50,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:50,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992902181] [2021-05-03 14:41:50,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104339252] [2021-05-03 14:41:50,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:50,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:50,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:50,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:50,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:41:50,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:50,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:50,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:41:50,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:50,979 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:41:50,980 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:41:50,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:41:50,982 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:41:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:51,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:51,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:41:51,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947993193] [2021-05-03 14:41:51,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:41:51,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:51,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:41:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:41:51,003 INFO L87 Difference]: Start difference. First operand 132 states and 283 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:52,129 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-05-03 14:41:52,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:41:52,132 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:52,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:52,132 INFO L225 Difference]: With dead ends: 175 [2021-05-03 14:41:52,132 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 14:41:52,132 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 892.2ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:41:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 14:41:52,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2021-05-03 14:41:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1603053435114505) internal successors, (283), 131 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:52,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 283 transitions. [2021-05-03 14:41:52,134 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 283 transitions. Word has length 19 [2021-05-03 14:41:52,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:52,134 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 283 transitions. [2021-05-03 14:41:52,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:52,134 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 283 transitions. [2021-05-03 14:41:52,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:52,134 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:52,134 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:52,334 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2356 [2021-05-03 14:41:52,334 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:52,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:52,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1351133514, now seen corresponding path program 464 times [2021-05-03 14:41:52,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:52,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197162381] [2021-05-03 14:41:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:52,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:52,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197162381] [2021-05-03 14:41:52,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764024007] [2021-05-03 14:41:52,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:52,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:41:52,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:52,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:52,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:53,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:53,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:53,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:53,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:53,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:53,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:53,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:41:53,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:53,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:53,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:53,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:41:53,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:53,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:53,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:53,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:53,228 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-05-03 14:41:53,229 INFO L628 ElimStorePlain]: treesize reduction 65, result has 38.1 percent of original size [2021-05-03 14:41:53,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:53,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:41:53,237 INFO L550 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:41:53,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:41:53,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:41:53,275 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:133, output treesize:22 [2021-05-03 14:41:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:53,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:53,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:41:53,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132162759] [2021-05-03 14:41:53,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:41:53,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:53,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:41:53,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:41:53,364 INFO L87 Difference]: Start difference. First operand 132 states and 283 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:53,602 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-05-03 14:41:54,004 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-05-03 14:41:54,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:54,649 INFO L93 Difference]: Finished difference Result 172 states and 355 transitions. [2021-05-03 14:41:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:41:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:54,652 INFO L225 Difference]: With dead ends: 172 [2021-05-03 14:41:54,652 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:41:54,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1199.8ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:41:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:41:54,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 137. [2021-05-03 14:41:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 295 transitions. [2021-05-03 14:41:54,654 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 295 transitions. Word has length 19 [2021-05-03 14:41:54,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:54,654 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 295 transitions. [2021-05-03 14:41:54,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 295 transitions. [2021-05-03 14:41:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:54,654 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:54,654 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:54,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2360,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:54,855 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:54,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1127202046, now seen corresponding path program 465 times [2021-05-03 14:41:54,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:54,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162694725] [2021-05-03 14:41:54,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:55,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162694725] [2021-05-03 14:41:55,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053618941] [2021-05-03 14:41:55,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:55,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:41:55,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:55,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:41:55,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:55,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:55,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:55,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:41:55,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:55,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:55,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:55,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:55,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:55,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:55,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:55,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:41:55,509 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:55,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:55,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:55,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:55,677 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 19 [2021-05-03 14:41:55,678 INFO L628 ElimStorePlain]: treesize reduction 79, result has 32.5 percent of original size [2021-05-03 14:41:55,678 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:41:55,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:41:55,679 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:141, output treesize:22 [2021-05-03 14:41:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:55,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:55,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:41:55,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789766107] [2021-05-03 14:41:55,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:41:55,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:55,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:41:55,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:41:55,781 INFO L87 Difference]: Start difference. First operand 137 states and 295 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:57,408 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 25 [2021-05-03 14:41:57,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:41:57,577 INFO L93 Difference]: Finished difference Result 213 states and 439 transitions. [2021-05-03 14:41:57,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:41:57,580 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:41:57,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:41:57,581 INFO L225 Difference]: With dead ends: 213 [2021-05-03 14:41:57,581 INFO L226 Difference]: Without dead ends: 213 [2021-05-03 14:41:57,581 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1689.9ms TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:41:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-03 14:41:57,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2021-05-03 14:41:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 295 transitions. [2021-05-03 14:41:57,582 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 295 transitions. Word has length 19 [2021-05-03 14:41:57,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:41:57,583 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 295 transitions. [2021-05-03 14:41:57,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 295 transitions. [2021-05-03 14:41:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:41:57,583 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:41:57,583 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:41:57,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2365 [2021-05-03 14:41:57,783 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:41:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:41:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash -283588786, now seen corresponding path program 466 times [2021-05-03 14:41:57,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:41:57,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348580632] [2021-05-03 14:41:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:41:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:41:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:58,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348580632] [2021-05-03 14:41:58,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645974769] [2021-05-03 14:41:58,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:41:58,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:41:58,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:41:58,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:41:58,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:41:58,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:58,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:58,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:41:58,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:58,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:58,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:58,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:41:58,537 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:58,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:58,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:58,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:41:58,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:58,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:41:58,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:41:58,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:41:58,680 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-05-03 14:41:58,681 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:41:58,681 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:41:58,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:41:58,683 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:41:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:41:58,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:41:58,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:41:58,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441777204] [2021-05-03 14:41:58,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:41:58,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:41:58,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:41:58,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:41:58,806 INFO L87 Difference]: Start difference. First operand 137 states and 295 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:41:59,616 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2021-05-03 14:42:00,167 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-03 14:42:00,510 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-05-03 14:42:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:00,636 INFO L93 Difference]: Finished difference Result 181 states and 380 transitions. [2021-05-03 14:42:00,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:42:00,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:00,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:00,639 INFO L225 Difference]: With dead ends: 181 [2021-05-03 14:42:00,639 INFO L226 Difference]: Without dead ends: 179 [2021-05-03 14:42:00,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1791.8ms TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:42:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-03 14:42:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 137. [2021-05-03 14:42:00,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.161764705882353) internal successors, (294), 136 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 294 transitions. [2021-05-03 14:42:00,641 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 294 transitions. Word has length 19 [2021-05-03 14:42:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:00,641 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 294 transitions. [2021-05-03 14:42:00,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:00,641 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 294 transitions. [2021-05-03 14:42:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:00,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:00,641 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:00,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2368,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:00,841 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:00,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1807648510, now seen corresponding path program 467 times [2021-05-03 14:42:00,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:00,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840566111] [2021-05-03 14:42:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:01,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840566111] [2021-05-03 14:42:01,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79736770] [2021-05-03 14:42:01,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:01,205 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:42:01,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:01,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:01,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:01,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:01,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:01,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402556927] [2021-05-03 14:42:01,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:01,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:01,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:01,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:01,680 INFO L87 Difference]: Start difference. First operand 137 states and 294 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:02,002 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 14:42:02,419 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:42:02,919 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-05-03 14:42:03,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:03,117 INFO L93 Difference]: Finished difference Result 155 states and 330 transitions. [2021-05-03 14:42:03,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:42:03,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:03,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:03,120 INFO L225 Difference]: With dead ends: 155 [2021-05-03 14:42:03,121 INFO L226 Difference]: Without dead ends: 155 [2021-05-03 14:42:03,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1235.7ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:42:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-03 14:42:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2021-05-03 14:42:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1615384615384614) internal successors, (281), 130 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:03,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 281 transitions. [2021-05-03 14:42:03,122 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 281 transitions. Word has length 19 [2021-05-03 14:42:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:03,122 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 281 transitions. [2021-05-03 14:42:03,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 281 transitions. [2021-05-03 14:42:03,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:03,122 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:03,122 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:03,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2379 [2021-05-03 14:42:03,323 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:03,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:03,323 INFO L82 PathProgramCache]: Analyzing trace with hash -979582074, now seen corresponding path program 468 times [2021-05-03 14:42:03,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:03,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387325799] [2021-05-03 14:42:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:03,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:03,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387325799] [2021-05-03 14:42:03,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691425297] [2021-05-03 14:42:03,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:03,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:42:03,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:03,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:04,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:04,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:04,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:04,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:04,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:04,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:42:04,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:04,265 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-05-03 14:42:04,266 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:42:04,266 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:42:04,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:42:04,274 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:04,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:04,327 INFO L518 ElimStorePlain]: Eliminatee v_prenex_371 vanished before elimination [2021-05-03 14:42:04,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:42:04,330 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:42:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:04,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:04,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:04,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176779957] [2021-05-03 14:42:04,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:04,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:04,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:04,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:04,456 INFO L87 Difference]: Start difference. First operand 131 states and 281 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:04,870 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:42:05,661 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-05-03 14:42:05,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:05,874 INFO L93 Difference]: Finished difference Result 175 states and 361 transitions. [2021-05-03 14:42:05,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:42:05,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:05,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:05,877 INFO L225 Difference]: With dead ends: 175 [2021-05-03 14:42:05,877 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 14:42:05,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1212.3ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:42:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 14:42:05,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 133. [2021-05-03 14:42:05,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1666666666666665) internal successors, (286), 132 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:05,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 286 transitions. [2021-05-03 14:42:05,879 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 286 transitions. Word has length 19 [2021-05-03 14:42:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:05,879 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 286 transitions. [2021-05-03 14:42:05,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 286 transitions. [2021-05-03 14:42:05,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:05,879 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:05,879 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:06,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2389,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:06,080 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:06,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1030603636, now seen corresponding path program 469 times [2021-05-03 14:42:06,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:06,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716306076] [2021-05-03 14:42:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:06,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:06,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716306076] [2021-05-03 14:42:06,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818022343] [2021-05-03 14:42:06,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:06,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:06,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:06,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:06,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:06,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:06,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970714159] [2021-05-03 14:42:06,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:06,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:06,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:06,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:06,923 INFO L87 Difference]: Start difference. First operand 133 states and 286 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:08,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:08,068 INFO L93 Difference]: Finished difference Result 219 states and 449 transitions. [2021-05-03 14:42:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:42:08,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:08,072 INFO L225 Difference]: With dead ends: 219 [2021-05-03 14:42:08,072 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 14:42:08,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 952.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:42:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 14:42:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 134. [2021-05-03 14:42:08,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.18796992481203) internal successors, (291), 133 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 291 transitions. [2021-05-03 14:42:08,073 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 291 transitions. Word has length 19 [2021-05-03 14:42:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:08,074 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 291 transitions. [2021-05-03 14:42:08,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:08,074 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 291 transitions. [2021-05-03 14:42:08,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:08,074 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:08,074 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:08,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:08,274 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:08,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1852517328, now seen corresponding path program 470 times [2021-05-03 14:42:08,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:08,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224427695] [2021-05-03 14:42:08,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:08,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224427695] [2021-05-03 14:42:08,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202075050] [2021-05-03 14:42:08,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:08,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:42:08,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:08,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:42:08,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:09,114 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:09,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:09,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:09,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482829183] [2021-05-03 14:42:09,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:09,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:09,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:09,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:09,114 INFO L87 Difference]: Start difference. First operand 134 states and 291 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:09,512 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-05-03 14:42:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:10,074 INFO L93 Difference]: Finished difference Result 144 states and 307 transitions. [2021-05-03 14:42:10,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:42:10,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:10,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:10,078 INFO L225 Difference]: With dead ends: 144 [2021-05-03 14:42:10,078 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:42:10,078 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 930.1ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:42:10,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:42:10,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2021-05-03 14:42:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.180451127819549) internal successors, (290), 133 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:10,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 290 transitions. [2021-05-03 14:42:10,079 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 290 transitions. Word has length 19 [2021-05-03 14:42:10,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:10,079 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 290 transitions. [2021-05-03 14:42:10,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:10,079 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 290 transitions. [2021-05-03 14:42:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:10,079 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:10,079 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:10,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2406 [2021-05-03 14:42:10,280 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:10,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1765636094, now seen corresponding path program 471 times [2021-05-03 14:42:10,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:10,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056509368] [2021-05-03 14:42:10,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:10,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:10,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056509368] [2021-05-03 14:42:10,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001498742] [2021-05-03 14:42:10,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:10,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:42:10,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:10,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:11,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:11,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:11,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282416454] [2021-05-03 14:42:11,017 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:11,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:11,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:11,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:11,017 INFO L87 Difference]: Start difference. First operand 134 states and 290 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:11,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:11,798 INFO L93 Difference]: Finished difference Result 171 states and 361 transitions. [2021-05-03 14:42:11,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:42:11,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:11,801 INFO L225 Difference]: With dead ends: 171 [2021-05-03 14:42:11,801 INFO L226 Difference]: Without dead ends: 171 [2021-05-03 14:42:11,802 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 705.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:42:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-03 14:42:11,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 129. [2021-05-03 14:42:11,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1640625) internal successors, (277), 128 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 277 transitions. [2021-05-03 14:42:11,803 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 277 transitions. Word has length 19 [2021-05-03 14:42:11,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:11,803 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 277 transitions. [2021-05-03 14:42:11,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:11,803 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 277 transitions. [2021-05-03 14:42:11,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:11,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:11,803 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:12,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2411 [2021-05-03 14:42:12,004 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:12,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:12,004 INFO L82 PathProgramCache]: Analyzing trace with hash 447244630, now seen corresponding path program 472 times [2021-05-03 14:42:12,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:12,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218733267] [2021-05-03 14:42:12,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:12,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218733267] [2021-05-03 14:42:12,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386403519] [2021-05-03 14:42:12,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:12,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:42:12,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:12,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:12,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:12,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:12,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:42:12,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:12,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:12,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:42:12,675 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:12,728 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:42:12,728 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:42:12,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:42:12,730 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:42:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:12,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:12,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:12,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171478943] [2021-05-03 14:42:12,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:12,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:12,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:12,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:12,752 INFO L87 Difference]: Start difference. First operand 129 states and 277 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:13,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:13,842 INFO L93 Difference]: Finished difference Result 169 states and 357 transitions. [2021-05-03 14:42:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:42:13,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:13,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:13,845 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:42:13,845 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:42:13,845 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 797.2ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:42:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:42:13,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 129. [2021-05-03 14:42:13,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1640625) internal successors, (277), 128 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 277 transitions. [2021-05-03 14:42:13,847 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 277 transitions. Word has length 19 [2021-05-03 14:42:13,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:13,847 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 277 transitions. [2021-05-03 14:42:13,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:13,847 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 277 transitions. [2021-05-03 14:42:13,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:13,847 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:13,847 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:14,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2415,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:14,047 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:14,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:14,048 INFO L82 PathProgramCache]: Analyzing trace with hash 87328112, now seen corresponding path program 473 times [2021-05-03 14:42:14,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:14,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375049186] [2021-05-03 14:42:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:14,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:14,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375049186] [2021-05-03 14:42:14,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986612481] [2021-05-03 14:42:14,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:14,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:42:14,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:14,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:14,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:14,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:14,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:14,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:14,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:14,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:14,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:14,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:42:14,753 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:14,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:14,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:14,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:42:14,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:14,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:14,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:42:14,774 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:14,889 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-05-03 14:42:14,890 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:42:14,890 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:42:14,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:42:14,892 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:42:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:15,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:15,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:15,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382160429] [2021-05-03 14:42:15,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:15,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:15,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:15,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:15,042 INFO L87 Difference]: Start difference. First operand 129 states and 277 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:16,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:16,105 INFO L93 Difference]: Finished difference Result 183 states and 386 transitions. [2021-05-03 14:42:16,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:42:16,108 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:16,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:16,109 INFO L225 Difference]: With dead ends: 183 [2021-05-03 14:42:16,109 INFO L226 Difference]: Without dead ends: 183 [2021-05-03 14:42:16,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 965.8ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:42:16,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-03 14:42:16,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2021-05-03 14:42:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1666666666666665) internal successors, (273), 126 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 273 transitions. [2021-05-03 14:42:16,110 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 273 transitions. Word has length 19 [2021-05-03 14:42:16,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:16,110 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 273 transitions. [2021-05-03 14:42:16,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:16,110 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 273 transitions. [2021-05-03 14:42:16,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:16,111 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:16,111 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:16,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2419,474 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:16,324 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:16,324 INFO L82 PathProgramCache]: Analyzing trace with hash -2019456008, now seen corresponding path program 474 times [2021-05-03 14:42:16,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:16,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338937621] [2021-05-03 14:42:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:16,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:16,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338937621] [2021-05-03 14:42:16,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158979669] [2021-05-03 14:42:16,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:16,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:42:16,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:16,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:42:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:17,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:17,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:17,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:17,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:17,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:17,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:42:17,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:17,196 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-05-03 14:42:17,197 INFO L628 ElimStorePlain]: treesize reduction 80, result has 38.9 percent of original size [2021-05-03 14:42:17,197 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:42:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:17,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:42:17,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:17,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:17,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:17,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:42:17,277 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:42:17,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:17,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:42:17,338 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:42:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:17,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:17,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:17,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938936030] [2021-05-03 14:42:17,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:17,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:17,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:17,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:17,499 INFO L87 Difference]: Start difference. First operand 127 states and 273 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:18,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:18,416 INFO L93 Difference]: Finished difference Result 166 states and 345 transitions. [2021-05-03 14:42:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:42:18,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:18,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:18,419 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:42:18,419 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 14:42:18,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1023.9ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:42:18,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 14:42:18,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 129. [2021-05-03 14:42:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.171875) internal successors, (278), 128 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:18,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 278 transitions. [2021-05-03 14:42:18,423 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 278 transitions. Word has length 19 [2021-05-03 14:42:18,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:18,424 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 278 transitions. [2021-05-03 14:42:18,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:18,424 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 278 transitions. [2021-05-03 14:42:18,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:18,424 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:18,424 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:18,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2429,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:18,624 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1309408238, now seen corresponding path program 475 times [2021-05-03 14:42:18,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:18,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206509527] [2021-05-03 14:42:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:18,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:18,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206509527] [2021-05-03 14:42:18,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359667487] [2021-05-03 14:42:18,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:18,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:18,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:19,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:19,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:19,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:19,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335602790] [2021-05-03 14:42:19,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:19,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:19,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:19,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:19,471 INFO L87 Difference]: Start difference. First operand 129 states and 278 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:20,503 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-05-03 14:42:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:20,937 INFO L93 Difference]: Finished difference Result 207 states and 422 transitions. [2021-05-03 14:42:20,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:42:20,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:20,940 INFO L225 Difference]: With dead ends: 207 [2021-05-03 14:42:20,940 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 14:42:20,940 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1399.7ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:42:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 14:42:20,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 130. [2021-05-03 14:42:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-05-03 14:42:20,942 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 19 [2021-05-03 14:42:20,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:20,942 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-05-03 14:42:20,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-05-03 14:42:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:20,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:20,942 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:21,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2433 [2021-05-03 14:42:21,143 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:21,143 INFO L82 PathProgramCache]: Analyzing trace with hash 752507064, now seen corresponding path program 476 times [2021-05-03 14:42:21,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:21,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293484483] [2021-05-03 14:42:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:21,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293484483] [2021-05-03 14:42:21,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600874905] [2021-05-03 14:42:21,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:21,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:42:21,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:21,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:42:21,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:21,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:21,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:21,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820422902] [2021-05-03 14:42:21,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:21,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:21,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:21,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:21,758 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:22,614 INFO L93 Difference]: Finished difference Result 135 states and 289 transitions. [2021-05-03 14:42:22,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:42:22,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:22,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:22,617 INFO L225 Difference]: With dead ends: 135 [2021-05-03 14:42:22,617 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 14:42:22,617 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 787.8ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:42:22,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 14:42:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-05-03 14:42:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.186046511627907) internal successors, (282), 129 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:22,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 282 transitions. [2021-05-03 14:42:22,619 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 282 transitions. Word has length 19 [2021-05-03 14:42:22,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:22,619 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 282 transitions. [2021-05-03 14:42:22,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:22,619 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 282 transitions. [2021-05-03 14:42:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:22,619 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:22,619 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:22,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2445 [2021-05-03 14:42:22,829 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:22,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:22,829 INFO L82 PathProgramCache]: Analyzing trace with hash 839388298, now seen corresponding path program 477 times [2021-05-03 14:42:22,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:22,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42029359] [2021-05-03 14:42:22,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:23,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42029359] [2021-05-03 14:42:23,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228094171] [2021-05-03 14:42:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:23,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:42:23,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:23,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:23,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:23,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:23,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:23,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141524824] [2021-05-03 14:42:23,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:23,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:23,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:23,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:23,576 INFO L87 Difference]: Start difference. First operand 130 states and 282 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:24,350 INFO L93 Difference]: Finished difference Result 162 states and 343 transitions. [2021-05-03 14:42:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:42:24,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:24,352 INFO L225 Difference]: With dead ends: 162 [2021-05-03 14:42:24,352 INFO L226 Difference]: Without dead ends: 162 [2021-05-03 14:42:24,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 732.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:42:24,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-03 14:42:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2021-05-03 14:42:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.168) internal successors, (271), 125 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:24,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 271 transitions. [2021-05-03 14:42:24,354 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 271 transitions. Word has length 19 [2021-05-03 14:42:24,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:24,354 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 271 transitions. [2021-05-03 14:42:24,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 271 transitions. [2021-05-03 14:42:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:24,354 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:24,354 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:24,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2450,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:24,555 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:24,555 INFO L82 PathProgramCache]: Analyzing trace with hash 963575506, now seen corresponding path program 478 times [2021-05-03 14:42:24,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:24,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27166417] [2021-05-03 14:42:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:24,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27166417] [2021-05-03 14:42:24,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209018910] [2021-05-03 14:42:24,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:24,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:42:24,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:25,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:25,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:25,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287660467] [2021-05-03 14:42:25,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:25,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:25,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:25,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:25,421 INFO L87 Difference]: Start difference. First operand 126 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:26,558 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-05-03 14:42:26,715 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:42:26,914 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:42:27,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:27,263 INFO L93 Difference]: Finished difference Result 199 states and 408 transitions. [2021-05-03 14:42:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:42:27,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:27,266 INFO L225 Difference]: With dead ends: 199 [2021-05-03 14:42:27,266 INFO L226 Difference]: Without dead ends: 196 [2021-05-03 14:42:27,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1769.8ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:42:27,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-03 14:42:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 132. [2021-05-03 14:42:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1755725190839694) internal successors, (285), 131 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:27,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 285 transitions. [2021-05-03 14:42:27,268 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 285 transitions. Word has length 19 [2021-05-03 14:42:27,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:27,268 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 285 transitions. [2021-05-03 14:42:27,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 285 transitions. [2021-05-03 14:42:27,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:27,268 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:27,268 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:27,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2454 [2021-05-03 14:42:27,468 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:27,469 INFO L82 PathProgramCache]: Analyzing trace with hash 739644038, now seen corresponding path program 479 times [2021-05-03 14:42:27,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:27,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073493131] [2021-05-03 14:42:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073493131] [2021-05-03 14:42:27,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875716445] [2021-05-03 14:42:27,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:27,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:42:27,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:27,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:27,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:28,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:28,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:28,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:42:28,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:28,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:42:28,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:28,430 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 14:42:28,431 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:42:28,431 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:42:28,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:42:28,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:28,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:28,491 INFO L518 ElimStorePlain]: Eliminatee v_prenex_379 vanished before elimination [2021-05-03 14:42:28,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:42:28,493 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:42:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:28,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:28,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:28,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043682484] [2021-05-03 14:42:28,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:28,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:28,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:28,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:28,652 INFO L87 Difference]: Start difference. First operand 132 states and 285 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:29,609 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:42:29,879 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:42:30,107 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-05-03 14:42:30,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:30,215 INFO L93 Difference]: Finished difference Result 174 states and 359 transitions. [2021-05-03 14:42:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:42:30,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:30,218 INFO L225 Difference]: With dead ends: 174 [2021-05-03 14:42:30,218 INFO L226 Difference]: Without dead ends: 174 [2021-05-03 14:42:30,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1586.2ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:42:30,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-03 14:42:30,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 132. [2021-05-03 14:42:30,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1755725190839694) internal successors, (285), 131 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 285 transitions. [2021-05-03 14:42:30,219 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 285 transitions. Word has length 19 [2021-05-03 14:42:30,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:30,219 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 285 transitions. [2021-05-03 14:42:30,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:30,219 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 285 transitions. [2021-05-03 14:42:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:30,219 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:30,220 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:30,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2465 [2021-05-03 14:42:30,420 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:30,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2099760778, now seen corresponding path program 480 times [2021-05-03 14:42:30,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:30,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997632496] [2021-05-03 14:42:30,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:30,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997632496] [2021-05-03 14:42:30,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095439205] [2021-05-03 14:42:30,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:30,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:42:30,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:30,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:42:30,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:31,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:31,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:31,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:31,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:31,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:31,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:31,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:31,279 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 32 [2021-05-03 14:42:31,279 INFO L628 ElimStorePlain]: treesize reduction 70, result has 41.2 percent of original size [2021-05-03 14:42:31,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:31,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:42:31,288 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:42:31,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:31,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:42:31,336 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:31,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:31,374 INFO L518 ElimStorePlain]: Eliminatee v_prenex_382 vanished before elimination [2021-05-03 14:42:31,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:42:31,377 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:133, output treesize:22 [2021-05-03 14:42:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:31,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:31,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:31,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657152774] [2021-05-03 14:42:31,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:31,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:31,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:31,523 INFO L87 Difference]: Start difference. First operand 132 states and 285 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:32,607 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:42:32,840 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:42:33,050 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:42:33,201 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 14:42:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:33,496 INFO L93 Difference]: Finished difference Result 222 states and 457 transitions. [2021-05-03 14:42:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:42:33,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:33,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:33,498 INFO L225 Difference]: With dead ends: 222 [2021-05-03 14:42:33,498 INFO L226 Difference]: Without dead ends: 222 [2021-05-03 14:42:33,499 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1809.6ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:42:33,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-03 14:42:33,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 131. [2021-05-03 14:42:33,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1769230769230767) internal successors, (283), 130 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:33,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 283 transitions. [2021-05-03 14:42:33,500 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 283 transitions. Word has length 19 [2021-05-03 14:42:33,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:33,500 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 283 transitions. [2021-05-03 14:42:33,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:33,500 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 283 transitions. [2021-05-03 14:42:33,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:33,500 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:33,500 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:33,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2472,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:33,701 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:33,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:33,701 INFO L82 PathProgramCache]: Analyzing trace with hash -133291216, now seen corresponding path program 481 times [2021-05-03 14:42:33,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:33,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521050734] [2021-05-03 14:42:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:33,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:34,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521050734] [2021-05-03 14:42:34,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521037772] [2021-05-03 14:42:34,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:34,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:34,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:34,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:34,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:34,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:34,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161452735] [2021-05-03 14:42:34,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:34,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:34,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:34,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:34,436 INFO L87 Difference]: Start difference. First operand 131 states and 283 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:34,782 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-05-03 14:42:35,467 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:42:35,714 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:42:36,047 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2021-05-03 14:42:36,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:36,092 INFO L93 Difference]: Finished difference Result 143 states and 301 transitions. [2021-05-03 14:42:36,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:42:36,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:36,096 INFO L225 Difference]: With dead ends: 143 [2021-05-03 14:42:36,096 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:42:36,096 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1486.5ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:42:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:42:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2021-05-03 14:42:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.169230769230769) internal successors, (282), 130 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 282 transitions. [2021-05-03 14:42:36,097 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 282 transitions. Word has length 19 [2021-05-03 14:42:36,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:36,097 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 282 transitions. [2021-05-03 14:42:36,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:36,097 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 282 transitions. [2021-05-03 14:42:36,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:36,097 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:36,098 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:36,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2476 [2021-05-03 14:42:36,298 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:36,298 INFO L82 PathProgramCache]: Analyzing trace with hash -46409982, now seen corresponding path program 482 times [2021-05-03 14:42:36,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:36,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722856387] [2021-05-03 14:42:36,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:36,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:36,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722856387] [2021-05-03 14:42:36,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683214135] [2021-05-03 14:42:36,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:36,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:42:36,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:42:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:36,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:36,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:36,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:36,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:36,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:36,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:36,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:37,047 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:42:37,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:37,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:42:37,056 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:42:37,069 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:37,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:42:37,072 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:42:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:37,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:37,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:37,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280264822] [2021-05-03 14:42:37,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:37,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:37,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:37,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:37,168 INFO L87 Difference]: Start difference. First operand 131 states and 282 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:38,054 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 14:42:38,374 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 14:42:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:38,604 INFO L93 Difference]: Finished difference Result 202 states and 421 transitions. [2021-05-03 14:42:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:42:38,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:38,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:38,606 INFO L225 Difference]: With dead ends: 202 [2021-05-03 14:42:38,606 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 14:42:38,607 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1264.2ms TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:42:38,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 14:42:38,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 130. [2021-05-03 14:42:38,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1705426356589146) internal successors, (280), 129 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:38,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 280 transitions. [2021-05-03 14:42:38,608 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 280 transitions. Word has length 19 [2021-05-03 14:42:38,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:38,608 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 280 transitions. [2021-05-03 14:42:38,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 280 transitions. [2021-05-03 14:42:38,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:38,608 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:38,608 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:38,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2481,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:38,809 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:38,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:38,809 INFO L82 PathProgramCache]: Analyzing trace with hash -639637482, now seen corresponding path program 483 times [2021-05-03 14:42:38,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:38,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336183846] [2021-05-03 14:42:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:39,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336183846] [2021-05-03 14:42:39,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506276185] [2021-05-03 14:42:39,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:39,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:42:39,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:39,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:39,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:39,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:39,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:39,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157600261] [2021-05-03 14:42:39,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:39,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:39,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:39,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:39,454 INFO L87 Difference]: Start difference. First operand 130 states and 280 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:40,088 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:42:40,298 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 14:42:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:40,362 INFO L93 Difference]: Finished difference Result 138 states and 291 transitions. [2021-05-03 14:42:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:42:40,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:40,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:40,365 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:42:40,365 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:42:40,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 885.3ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:42:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:42:40,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2021-05-03 14:42:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1627906976744184) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-05-03 14:42:40,366 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 19 [2021-05-03 14:42:40,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:40,366 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-05-03 14:42:40,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-05-03 14:42:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:40,367 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:40,367 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:40,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2483,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:40,567 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:40,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:40,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2141773194, now seen corresponding path program 484 times [2021-05-03 14:42:40,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:40,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381808550] [2021-05-03 14:42:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:40,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381808550] [2021-05-03 14:42:40,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105064125] [2021-05-03 14:42:40,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:40,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:42:40,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:40,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:42:40,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:41,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:41,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:41,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:41,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:41,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:41,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:41,168 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:41,226 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:42:41,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:41,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:42:41,237 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:42:41,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:41,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:42:41,258 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:42:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:41,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:41,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:41,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667961949] [2021-05-03 14:42:41,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:41,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:41,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:41,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:41,339 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:42,021 INFO L93 Difference]: Finished difference Result 165 states and 349 transitions. [2021-05-03 14:42:42,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:42:42,023 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:42,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:42,023 INFO L225 Difference]: With dead ends: 165 [2021-05-03 14:42:42,023 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:42:42,024 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 537.5ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:42:42,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:42:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 121. [2021-05-03 14:42:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.15) internal successors, (258), 120 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:42,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 258 transitions. [2021-05-03 14:42:42,025 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 258 transitions. Word has length 19 [2021-05-03 14:42:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:42,025 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 258 transitions. [2021-05-03 14:42:42,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 258 transitions. [2021-05-03 14:42:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:42,026 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:42,026 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:42,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2488,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:42,241 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -401377842, now seen corresponding path program 485 times [2021-05-03 14:42:42,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:42,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484080850] [2021-05-03 14:42:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:42,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484080850] [2021-05-03 14:42:42,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099560431] [2021-05-03 14:42:42,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:42,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:42:42,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:42,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:42,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:42,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:42,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:42:42,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:42,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:42:42,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:42,911 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:42:42,911 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:42:42,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:42:42,914 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:42:42,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:42,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:42,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:42,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725430681] [2021-05-03 14:42:42,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:42,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:42,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:42,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:42,934 INFO L87 Difference]: Start difference. First operand 121 states and 258 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:43,832 INFO L93 Difference]: Finished difference Result 165 states and 346 transitions. [2021-05-03 14:42:43,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:42:43,834 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:43,834 INFO L225 Difference]: With dead ends: 165 [2021-05-03 14:42:43,834 INFO L226 Difference]: Without dead ends: 165 [2021-05-03 14:42:43,834 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:42:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-03 14:42:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 121. [2021-05-03 14:42:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.15) internal successors, (258), 120 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 258 transitions. [2021-05-03 14:42:43,835 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 258 transitions. Word has length 19 [2021-05-03 14:42:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:43,836 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 258 transitions. [2021-05-03 14:42:43,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 258 transitions. [2021-05-03 14:42:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:43,836 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:43,836 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:44,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2490,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:44,036 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:44,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:44,037 INFO L82 PathProgramCache]: Analyzing trace with hash -761294360, now seen corresponding path program 486 times [2021-05-03 14:42:44,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:44,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491405996] [2021-05-03 14:42:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:44,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491405996] [2021-05-03 14:42:44,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856071059] [2021-05-03 14:42:44,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:44,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:42:44,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:44,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:44,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:44,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:42:44,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:44,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:44,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:44,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:44,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:44,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:44,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:44,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:42:44,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:44,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:44,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:42:44,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:44,798 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:42:44,798 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:42:44,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:42:44,800 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:42:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:44,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:44,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:44,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121432205] [2021-05-03 14:42:44,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:44,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:44,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:44,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:44,893 INFO L87 Difference]: Start difference. First operand 121 states and 258 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:46,053 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-05-03 14:42:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:46,104 INFO L93 Difference]: Finished difference Result 181 states and 379 transitions. [2021-05-03 14:42:46,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:42:46,107 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:46,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:46,107 INFO L225 Difference]: With dead ends: 181 [2021-05-03 14:42:46,107 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:42:46,107 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 974.1ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:42:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:42:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 122. [2021-05-03 14:42:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1487603305785123) internal successors, (260), 121 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 260 transitions. [2021-05-03 14:42:46,109 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 260 transitions. Word has length 19 [2021-05-03 14:42:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:46,109 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 260 transitions. [2021-05-03 14:42:46,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 260 transitions. [2021-05-03 14:42:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:46,109 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:46,109 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:46,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2494,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:46,309 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash -51246590, now seen corresponding path program 487 times [2021-05-03 14:42:46,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:46,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261162345] [2021-05-03 14:42:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:46,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261162345] [2021-05-03 14:42:46,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618091064] [2021-05-03 14:42:46,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:46,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:47,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:47,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:47,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125579374] [2021-05-03 14:42:47,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:47,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:47,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:47,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:47,069 INFO L87 Difference]: Start difference. First operand 122 states and 260 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:48,144 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:42:48,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:48,256 INFO L93 Difference]: Finished difference Result 146 states and 306 transitions. [2021-05-03 14:42:48,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:42:48,258 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:48,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:48,258 INFO L225 Difference]: With dead ends: 146 [2021-05-03 14:42:48,258 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 14:42:48,258 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1008.5ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:42:48,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 14:42:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2021-05-03 14:42:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1272727272727274) internal successors, (234), 110 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 234 transitions. [2021-05-03 14:42:48,260 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 234 transitions. Word has length 19 [2021-05-03 14:42:48,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:48,260 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 234 transitions. [2021-05-03 14:42:48,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:48,260 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 234 transitions. [2021-05-03 14:42:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:48,260 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:48,260 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:48,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2506 [2021-05-03 14:42:48,460 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1426888816, now seen corresponding path program 488 times [2021-05-03 14:42:48,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:48,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862865691] [2021-05-03 14:42:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:48,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:48,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862865691] [2021-05-03 14:42:48,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688976941] [2021-05-03 14:42:48,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:48,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:42:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:42:48,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:49,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:49,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:49,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:49,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:49,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:49,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:42:49,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:49,254 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-05-03 14:42:49,255 INFO L628 ElimStorePlain]: treesize reduction 76, result has 42.0 percent of original size [2021-05-03 14:42:49,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:49,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:42:49,263 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:42:49,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:49,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-05-03 14:42:49,335 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:49,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:49,379 INFO L518 ElimStorePlain]: Eliminatee v_prenex_386 vanished before elimination [2021-05-03 14:42:49,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:42:49,381 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:42:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:49,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:49,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:49,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42039874] [2021-05-03 14:42:49,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:49,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:49,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:49,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:49,548 INFO L87 Difference]: Start difference. First operand 111 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:50,732 INFO L93 Difference]: Finished difference Result 160 states and 326 transitions. [2021-05-03 14:42:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:42:50,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:50,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:50,735 INFO L225 Difference]: With dead ends: 160 [2021-05-03 14:42:50,735 INFO L226 Difference]: Without dead ends: 160 [2021-05-03 14:42:50,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1077.5ms TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:42:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-03 14:42:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 113. [2021-05-03 14:42:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 112 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:50,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 239 transitions. [2021-05-03 14:42:50,737 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 239 transitions. Word has length 19 [2021-05-03 14:42:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:50,737 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 239 transitions. [2021-05-03 14:42:50,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 239 transitions. [2021-05-03 14:42:50,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:50,737 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:50,737 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:50,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2516,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:50,937 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:50,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash 2136936586, now seen corresponding path program 489 times [2021-05-03 14:42:50,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:50,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292541702] [2021-05-03 14:42:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:51,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:51,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292541702] [2021-05-03 14:42:51,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997913294] [2021-05-03 14:42:51,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:51,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:42:51,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:51,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:51,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:51,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:51,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:51,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846385847] [2021-05-03 14:42:51,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:51,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:51,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:51,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:51,720 INFO L87 Difference]: Start difference. First operand 113 states and 239 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:52,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:52,945 INFO L93 Difference]: Finished difference Result 202 states and 406 transitions. [2021-05-03 14:42:52,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:42:52,947 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:52,948 INFO L225 Difference]: With dead ends: 202 [2021-05-03 14:42:52,948 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 14:42:52,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1224.6ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:42:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 14:42:52,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 114. [2021-05-03 14:42:52,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-05-03 14:42:52,949 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 19 [2021-05-03 14:42:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:52,949 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-05-03 14:42:52,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:52,949 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-05-03 14:42:52,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:52,949 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:52,949 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:53,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2520 [2021-05-03 14:42:53,150 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:53,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:53,150 INFO L82 PathProgramCache]: Analyzing trace with hash -96115408, now seen corresponding path program 490 times [2021-05-03 14:42:53,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:53,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710834624] [2021-05-03 14:42:53,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:53,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710834624] [2021-05-03 14:42:53,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985341846] [2021-05-03 14:42:53,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:53,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:42:53,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:53,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:53,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:53,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395524371] [2021-05-03 14:42:53,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:53,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:53,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:53,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:53,795 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:54,455 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:42:54,851 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:42:55,076 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-05-03 14:42:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:55,103 INFO L93 Difference]: Finished difference Result 126 states and 264 transitions. [2021-05-03 14:42:55,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:42:55,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:55,105 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:42:55,105 INFO L226 Difference]: Without dead ends: 122 [2021-05-03 14:42:55,106 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1135.4ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:42:55,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-03 14:42:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 114. [2021-05-03 14:42:55,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.150442477876106) internal successors, (243), 113 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 243 transitions. [2021-05-03 14:42:55,107 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 243 transitions. Word has length 19 [2021-05-03 14:42:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:55,107 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 243 transitions. [2021-05-03 14:42:55,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 243 transitions. [2021-05-03 14:42:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:55,107 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:55,107 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:55,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2530,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:55,307 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash -9234174, now seen corresponding path program 491 times [2021-05-03 14:42:55,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:55,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036440423] [2021-05-03 14:42:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:55,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036440423] [2021-05-03 14:42:55,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308292668] [2021-05-03 14:42:55,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:55,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:42:55,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:55,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:56,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:56,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:42:56,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224092640] [2021-05-03 14:42:56,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:42:56,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:42:56,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:42:56,042 INFO L87 Difference]: Start difference. First operand 114 states and 243 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:56,888 INFO L93 Difference]: Finished difference Result 148 states and 308 transitions. [2021-05-03 14:42:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:42:56,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:56,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:56,891 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:42:56,891 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:42:56,891 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 808.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:42:56,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:42:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 110. [2021-05-03 14:42:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.128440366972477) internal successors, (232), 109 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:56,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 232 transitions. [2021-05-03 14:42:56,893 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 232 transitions. Word has length 19 [2021-05-03 14:42:56,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:56,893 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 232 transitions. [2021-05-03 14:42:56,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:56,893 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 232 transitions. [2021-05-03 14:42:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:56,893 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:56,893 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:57,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2536 [2021-05-03 14:42:57,093 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash 541090536, now seen corresponding path program 492 times [2021-05-03 14:42:57,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:57,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696436267] [2021-05-03 14:42:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:57,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696436267] [2021-05-03 14:42:57,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324554054] [2021-05-03 14:42:57,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:57,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:42:57,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:42:57,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:42:57,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:42:57,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:57,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:57,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:42:57,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:57,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-05-03 14:42:57,845 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:58,027 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 14:42:58,028 INFO L628 ElimStorePlain]: treesize reduction 76, result has 41.1 percent of original size [2021-05-03 14:42:58,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:42:58,036 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:42:58,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:58,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:42:58,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-05-03 14:42:58,113 INFO L550 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:42:58,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:42:58,174 INFO L518 ElimStorePlain]: Eliminatee v_prenex_389 vanished before elimination [2021-05-03 14:42:58,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:42:58,177 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:141, output treesize:22 [2021-05-03 14:42:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:58,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:42:58,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:42:58,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291544585] [2021-05-03 14:42:58,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:42:58,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:42:58,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:42:58,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:42:58,314 INFO L87 Difference]: Start difference. First operand 110 states and 232 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:58,555 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:42:58,684 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:42:59,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:42:59,173 INFO L93 Difference]: Finished difference Result 146 states and 298 transitions. [2021-05-03 14:42:59,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:42:59,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:42:59,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:42:59,176 INFO L225 Difference]: With dead ends: 146 [2021-05-03 14:42:59,176 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 14:42:59,176 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 870.2ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:42:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 14:42:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-05-03 14:42:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.142857142857143) internal successors, (240), 112 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:59,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 240 transitions. [2021-05-03 14:42:59,178 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 240 transitions. Word has length 19 [2021-05-03 14:42:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:42:59,178 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 240 transitions. [2021-05-03 14:42:59,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:42:59,178 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 240 transitions. [2021-05-03 14:42:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:42:59,178 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:42:59,178 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:42:59,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2540 [2021-05-03 14:42:59,378 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:42:59,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:42:59,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1251138306, now seen corresponding path program 493 times [2021-05-03 14:42:59,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:42:59,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853427386] [2021-05-03 14:42:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:42:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:42:59,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853427386] [2021-05-03 14:42:59,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183136878] [2021-05-03 14:42:59,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:42:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:42:59,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:42:59,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:00,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:00,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:00,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765767323] [2021-05-03 14:43:00,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:00,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:00,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:00,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:00,232 INFO L87 Difference]: Start difference. First operand 113 states and 240 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:00,727 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:43:00,969 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:43:01,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:01,460 INFO L93 Difference]: Finished difference Result 184 states and 370 transitions. [2021-05-03 14:43:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:43:01,462 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:01,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:01,462 INFO L225 Difference]: With dead ends: 184 [2021-05-03 14:43:01,463 INFO L226 Difference]: Without dead ends: 184 [2021-05-03 14:43:01,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1203.2ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:43:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-03 14:43:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 115. [2021-05-03 14:43:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-05-03 14:43:01,464 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 19 [2021-05-03 14:43:01,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:01,464 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-05-03 14:43:01,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:01,464 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-05-03 14:43:01,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:01,464 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:01,464 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:01,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2546 [2021-05-03 14:43:01,665 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:01,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash -981913688, now seen corresponding path program 494 times [2021-05-03 14:43:01,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:01,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515508440] [2021-05-03 14:43:01,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:01,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:02,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515508440] [2021-05-03 14:43:02,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507103995] [2021-05-03 14:43:02,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:02,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:43:02,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:02,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:43:02,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:02,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:02,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:02,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840965833] [2021-05-03 14:43:02,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:02,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:02,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:02,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:02,487 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:02,849 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:43:03,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:03,375 INFO L93 Difference]: Finished difference Result 123 states and 258 transitions. [2021-05-03 14:43:03,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:43:03,378 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:03,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:03,378 INFO L225 Difference]: With dead ends: 123 [2021-05-03 14:43:03,378 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:43:03,379 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 982.5ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:43:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:43:03,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-05-03 14:43:03,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1666666666666665) internal successors, (247), 114 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:03,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 247 transitions. [2021-05-03 14:43:03,380 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 247 transitions. Word has length 19 [2021-05-03 14:43:03,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:03,380 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 247 transitions. [2021-05-03 14:43:03,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:03,380 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 247 transitions. [2021-05-03 14:43:03,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:03,380 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:03,380 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:03,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2558 [2021-05-03 14:43:03,580 INFO L428 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:03,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:03,581 INFO L82 PathProgramCache]: Analyzing trace with hash -895032454, now seen corresponding path program 495 times [2021-05-03 14:43:03,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:03,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460928918] [2021-05-03 14:43:03,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:03,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460928918] [2021-05-03 14:43:03,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30944215] [2021-05-03 14:43:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:03,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:43:03,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:03,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:04,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:04,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:04,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117475533] [2021-05-03 14:43:04,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:04,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:04,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:04,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:04,347 INFO L87 Difference]: Start difference. First operand 115 states and 247 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:05,006 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 14:43:05,197 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-05-03 14:43:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:05,627 INFO L93 Difference]: Finished difference Result 150 states and 313 transitions. [2021-05-03 14:43:05,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:43:05,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:05,629 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:43:05,629 INFO L226 Difference]: Without dead ends: 150 [2021-05-03 14:43:05,629 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1243.0ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:43:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-03 14:43:05,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 114. [2021-05-03 14:43:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.168141592920354) internal successors, (245), 113 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 245 transitions. [2021-05-03 14:43:05,631 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 245 transitions. Word has length 19 [2021-05-03 14:43:05,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:05,631 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 245 transitions. [2021-05-03 14:43:05,631 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:05,631 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 245 transitions. [2021-05-03 14:43:05,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:05,631 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:05,631 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:05,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2562 [2021-05-03 14:43:05,831 INFO L428 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:05,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1488259954, now seen corresponding path program 496 times [2021-05-03 14:43:05,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:05,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534097410] [2021-05-03 14:43:05,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:06,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534097410] [2021-05-03 14:43:06,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550060390] [2021-05-03 14:43:06,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:06,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:43:06,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:06,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:06,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:06,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:06,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:06,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:06,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579526915] [2021-05-03 14:43:06,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:06,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:06,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:06,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:06,646 INFO L87 Difference]: Start difference. First operand 114 states and 245 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:07,052 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:43:07,421 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:43:07,712 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-05-03 14:43:07,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:07,853 INFO L93 Difference]: Finished difference Result 120 states and 252 transitions. [2021-05-03 14:43:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:43:07,856 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:07,856 INFO L225 Difference]: With dead ends: 120 [2021-05-03 14:43:07,856 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 14:43:07,856 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1135.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:43:07,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 14:43:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-05-03 14:43:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.15929203539823) internal successors, (244), 113 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 244 transitions. [2021-05-03 14:43:07,857 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 244 transitions. Word has length 19 [2021-05-03 14:43:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:07,857 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 244 transitions. [2021-05-03 14:43:07,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 244 transitions. [2021-05-03 14:43:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:07,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:07,858 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:08,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2566 [2021-05-03 14:43:08,058 INFO L428 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:08,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:08,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1293150722, now seen corresponding path program 497 times [2021-05-03 14:43:08,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:08,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667868438] [2021-05-03 14:43:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:08,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667868438] [2021-05-03 14:43:08,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675972331] [2021-05-03 14:43:08,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:08,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:43:08,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:08,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:08,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:08,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:08,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:08,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526503654] [2021-05-03 14:43:08,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:08,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:08,787 INFO L87 Difference]: Start difference. First operand 114 states and 244 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:09,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:09,462 INFO L93 Difference]: Finished difference Result 141 states and 294 transitions. [2021-05-03 14:43:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:43:09,465 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:09,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:09,465 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:43:09,465 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:43:09,465 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 613.2ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:43:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:43:09,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2021-05-03 14:43:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.1296296296296298) internal successors, (230), 108 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 230 transitions. [2021-05-03 14:43:09,466 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 230 transitions. Word has length 19 [2021-05-03 14:43:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:09,466 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 230 transitions. [2021-05-03 14:43:09,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 230 transitions. [2021-05-03 14:43:09,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:09,467 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:09,467 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:09,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2572,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:09,667 INFO L428 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1798921338, now seen corresponding path program 498 times [2021-05-03 14:43:09,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:09,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967410044] [2021-05-03 14:43:09,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:10,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967410044] [2021-05-03 14:43:10,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258504028] [2021-05-03 14:43:10,046 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:10,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:43:10,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:10,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:10,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:10,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:10,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:43:10,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:10,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:10,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:43:10,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:10,758 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 14:43:10,758 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:43:10,759 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:43:10,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:43:10,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:10,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:43:10,825 INFO L518 ElimStorePlain]: Eliminatee v_prenex_396 vanished before elimination [2021-05-03 14:43:10,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:43:10,828 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:43:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:10,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:10,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:10,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049387918] [2021-05-03 14:43:10,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:10,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:10,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:10,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:10,953 INFO L87 Difference]: Start difference. First operand 109 states and 230 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:11,490 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:43:11,790 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-05-03 14:43:12,113 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-05-03 14:43:12,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:12,363 INFO L93 Difference]: Finished difference Result 143 states and 290 transitions. [2021-05-03 14:43:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:43:12,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:12,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:12,364 INFO L225 Difference]: With dead ends: 143 [2021-05-03 14:43:12,365 INFO L226 Difference]: Without dead ends: 143 [2021-05-03 14:43:12,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1401.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:43:12,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-03 14:43:12,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-05-03 14:43:12,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 112 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 241 transitions. [2021-05-03 14:43:12,366 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 241 transitions. Word has length 19 [2021-05-03 14:43:12,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:12,366 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 241 transitions. [2021-05-03 14:43:12,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:12,366 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 241 transitions. [2021-05-03 14:43:12,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:12,366 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:12,366 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:12,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2576 [2021-05-03 14:43:12,567 INFO L428 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash -438804598, now seen corresponding path program 499 times [2021-05-03 14:43:12,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:12,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940589574] [2021-05-03 14:43:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:12,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:12,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:12,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940589574] [2021-05-03 14:43:12,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613554495] [2021-05-03 14:43:12,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:12,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:12,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:13,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:13,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:13,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588087421] [2021-05-03 14:43:13,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:13,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:13,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:13,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:13,507 INFO L87 Difference]: Start difference. First operand 113 states and 241 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:13,922 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 14:43:14,183 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 14:43:14,566 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:43:15,281 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 14:43:15,500 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 14:43:15,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:15,541 INFO L93 Difference]: Finished difference Result 177 states and 356 transitions. [2021-05-03 14:43:15,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:43:15,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:15,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:15,544 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:43:15,544 INFO L226 Difference]: Without dead ends: 177 [2021-05-03 14:43:15,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1876.2ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:43:15,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-05-03 14:43:15,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 116. [2021-05-03 14:43:15,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1913043478260867) internal successors, (252), 115 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:15,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 252 transitions. [2021-05-03 14:43:15,545 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 252 transitions. Word has length 19 [2021-05-03 14:43:15,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:15,545 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 252 transitions. [2021-05-03 14:43:15,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 252 transitions. [2021-05-03 14:43:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:15,545 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:15,545 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:15,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2583,500 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:15,746 INFO L428 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:15,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1623110704, now seen corresponding path program 500 times [2021-05-03 14:43:15,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:15,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458934454] [2021-05-03 14:43:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:15,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:16,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458934454] [2021-05-03 14:43:16,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864813097] [2021-05-03 14:43:16,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:16,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:43:16,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:16,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:43:16,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:16,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:16,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:16,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770587522] [2021-05-03 14:43:16,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:16,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:16,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:16,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:16,745 INFO L87 Difference]: Start difference. First operand 116 states and 252 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:17,097 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:43:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:17,675 INFO L93 Difference]: Finished difference Result 127 states and 267 transitions. [2021-05-03 14:43:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:43:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:17,678 INFO L225 Difference]: With dead ends: 127 [2021-05-03 14:43:17,678 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:43:17,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1014.6ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:43:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:43:17,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 116. [2021-05-03 14:43:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1826086956521737) internal successors, (251), 115 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 251 transitions. [2021-05-03 14:43:17,680 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 251 transitions. Word has length 19 [2021-05-03 14:43:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:17,680 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 251 transitions. [2021-05-03 14:43:17,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 251 transitions. [2021-05-03 14:43:17,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:17,680 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:17,680 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:17,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2593,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:17,880 INFO L428 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:17,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1709991938, now seen corresponding path program 501 times [2021-05-03 14:43:17,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:17,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279283451] [2021-05-03 14:43:17,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:18,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:18,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279283451] [2021-05-03 14:43:18,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670077583] [2021-05-03 14:43:18,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:18,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:43:18,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:18,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:18,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:18,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:18,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:43:18,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114032799] [2021-05-03 14:43:18,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:43:18,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:18,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:43:18,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:43:18,804 INFO L87 Difference]: Start difference. First operand 116 states and 251 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:19,349 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-05-03 14:43:19,603 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-05-03 14:43:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:20,596 INFO L93 Difference]: Finished difference Result 158 states and 329 transitions. [2021-05-03 14:43:20,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:43:20,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:20,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:20,598 INFO L225 Difference]: With dead ends: 158 [2021-05-03 14:43:20,599 INFO L226 Difference]: Without dead ends: 158 [2021-05-03 14:43:20,599 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1414.4ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:43:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-03 14:43:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 115. [2021-05-03 14:43:20,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1842105263157894) internal successors, (249), 114 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 249 transitions. [2021-05-03 14:43:20,600 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 249 transitions. Word has length 19 [2021-05-03 14:43:20,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:20,600 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 249 transitions. [2021-05-03 14:43:20,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:20,600 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 249 transitions. [2021-05-03 14:43:20,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:20,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:20,600 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:20,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2598 [2021-05-03 14:43:20,801 INFO L428 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:20,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:20,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1116764438, now seen corresponding path program 502 times [2021-05-03 14:43:20,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:20,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520034626] [2021-05-03 14:43:20,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:21,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520034626] [2021-05-03 14:43:21,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825308438] [2021-05-03 14:43:21,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:21,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:43:21,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:21,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:21,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:21,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:21,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866740024] [2021-05-03 14:43:21,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:21,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:21,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:21,641 INFO L87 Difference]: Start difference. First operand 115 states and 249 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:22,057 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-03 14:43:22,353 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-03 14:43:22,577 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-03 14:43:22,892 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2021-05-03 14:43:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:23,023 INFO L93 Difference]: Finished difference Result 125 states and 262 transitions. [2021-05-03 14:43:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:43:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:23,026 INFO L225 Difference]: With dead ends: 125 [2021-05-03 14:43:23,026 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:43:23,026 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1349.8ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:43:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:43:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2021-05-03 14:43:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.175438596491228) internal successors, (248), 114 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:23,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 248 transitions. [2021-05-03 14:43:23,027 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 248 transitions. Word has length 19 [2021-05-03 14:43:23,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:23,028 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 248 transitions. [2021-05-03 14:43:23,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:23,028 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 248 transitions. [2021-05-03 14:43:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:23,028 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:23,028 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:23,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2602 [2021-05-03 14:43:23,228 INFO L428 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:23,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash -396792182, now seen corresponding path program 503 times [2021-05-03 14:43:23,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:23,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447903460] [2021-05-03 14:43:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:23,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447903460] [2021-05-03 14:43:23,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877337280] [2021-05-03 14:43:23,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:23,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:43:23,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:23,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:23,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:23,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:23,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241085123] [2021-05-03 14:43:23,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:23,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:23,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:23,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:23,997 INFO L87 Difference]: Start difference. First operand 115 states and 248 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:24,448 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:43:24,644 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2021-05-03 14:43:25,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:25,343 INFO L93 Difference]: Finished difference Result 151 states and 316 transitions. [2021-05-03 14:43:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:43:25,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:25,346 INFO L225 Difference]: With dead ends: 151 [2021-05-03 14:43:25,346 INFO L226 Difference]: Without dead ends: 151 [2021-05-03 14:43:25,346 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1305.6ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:43:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-03 14:43:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2021-05-03 14:43:25,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1769911504424777) internal successors, (246), 113 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 246 transitions. [2021-05-03 14:43:25,348 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 246 transitions. Word has length 19 [2021-05-03 14:43:25,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:25,348 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 246 transitions. [2021-05-03 14:43:25,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:25,348 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 246 transitions. [2021-05-03 14:43:25,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:25,348 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:25,348 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:25,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2607,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:25,548 INFO L428 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:25,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:25,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1695067920, now seen corresponding path program 504 times [2021-05-03 14:43:25,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:25,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672206990] [2021-05-03 14:43:25,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:25,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672206990] [2021-05-03 14:43:25,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301987706] [2021-05-03 14:43:25,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:25,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:43:25,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:25,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:43:25,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:26,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:26,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:26,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433343298] [2021-05-03 14:43:26,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:26,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:26,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:26,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:26,375 INFO L87 Difference]: Start difference. First operand 114 states and 246 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:27,291 INFO L93 Difference]: Finished difference Result 122 states and 256 transitions. [2021-05-03 14:43:27,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:43:27,293 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:27,293 INFO L225 Difference]: With dead ends: 122 [2021-05-03 14:43:27,293 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 14:43:27,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 877.8ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:43:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 14:43:27,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-05-03 14:43:27,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.168141592920354) internal successors, (245), 113 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:27,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 245 transitions. [2021-05-03 14:43:27,295 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 245 transitions. Word has length 19 [2021-05-03 14:43:27,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:27,295 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 245 transitions. [2021-05-03 14:43:27,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:27,295 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 245 transitions. [2021-05-03 14:43:27,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:27,295 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:27,295 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:27,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2611 [2021-05-03 14:43:27,495 INFO L428 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:27,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:27,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1282590462, now seen corresponding path program 505 times [2021-05-03 14:43:27,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:27,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777151562] [2021-05-03 14:43:27,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:27,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777151562] [2021-05-03 14:43:27,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717572043] [2021-05-03 14:43:27,771 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:27,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:27,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:43:27,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:28,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:28,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:28,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:43:28,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:28,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:28,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:43:28,297 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:28,372 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:43:28,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:28,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:43:28,384 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:43:28,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:43:28,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:43:28,410 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:43:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:28,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:28,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-05-03 14:43:28,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294927135] [2021-05-03 14:43:28,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:43:28,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:28,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:43:28,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:43:28,507 INFO L87 Difference]: Start difference. First operand 114 states and 245 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:29,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:29,073 INFO L93 Difference]: Finished difference Result 131 states and 274 transitions. [2021-05-03 14:43:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:43:29,076 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:29,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:29,076 INFO L225 Difference]: With dead ends: 131 [2021-05-03 14:43:29,076 INFO L226 Difference]: Without dead ends: 131 [2021-05-03 14:43:29,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 648.3ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:43:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-03 14:43:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 107. [2021-05-03 14:43:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.1320754716981134) internal successors, (226), 106 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 226 transitions. [2021-05-03 14:43:29,078 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 226 transitions. Word has length 19 [2021-05-03 14:43:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:29,078 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 226 transitions. [2021-05-03 14:43:29,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 226 transitions. [2021-05-03 14:43:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:29,078 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:29,078 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:29,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2616,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:29,278 INFO L428 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:29,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1439291086, now seen corresponding path program 506 times [2021-05-03 14:43:29,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:29,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719857646] [2021-05-03 14:43:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:29,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719857646] [2021-05-03 14:43:29,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119832991] [2021-05-03 14:43:29,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:29,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:43:29,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:29,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:43:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:29,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:29,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:43:29,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422816422] [2021-05-03 14:43:29,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:43:29,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:29,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:43:29,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:43:29,963 INFO L87 Difference]: Start difference. First operand 107 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:31,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:31,001 INFO L93 Difference]: Finished difference Result 126 states and 259 transitions. [2021-05-03 14:43:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:43:31,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:31,003 INFO L225 Difference]: With dead ends: 126 [2021-05-03 14:43:31,003 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:43:31,003 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 877.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:43:31,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:43:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2021-05-03 14:43:31,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 106 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 225 transitions. [2021-05-03 14:43:31,007 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 225 transitions. Word has length 19 [2021-05-03 14:43:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:31,007 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 225 transitions. [2021-05-03 14:43:31,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 225 transitions. [2021-05-03 14:43:31,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:31,007 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:31,007 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:31,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2618,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:31,209 INFO L428 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:31,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:31,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1207617126, now seen corresponding path program 507 times [2021-05-03 14:43:31,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:31,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787310102] [2021-05-03 14:43:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:31,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:31,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787310102] [2021-05-03 14:43:31,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119722330] [2021-05-03 14:43:31,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:31,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:43:31,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:31,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:31,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:31,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:43:31,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:31,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:31,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:43:31,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:32,029 INFO L628 ElimStorePlain]: treesize reduction 29, result has 32.6 percent of original size [2021-05-03 14:43:32,030 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:43:32,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:43:32,032 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:57, output treesize:6 [2021-05-03 14:43:32,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:32,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:32,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:43:32,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329206286] [2021-05-03 14:43:32,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:43:32,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:32,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:43:32,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:43:32,055 INFO L87 Difference]: Start difference. First operand 107 states and 225 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:33,336 INFO L93 Difference]: Finished difference Result 154 states and 319 transitions. [2021-05-03 14:43:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:43:33,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:33,340 INFO L225 Difference]: With dead ends: 154 [2021-05-03 14:43:33,340 INFO L226 Difference]: Without dead ends: 154 [2021-05-03 14:43:33,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 971.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:43:33,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-03 14:43:33,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 107. [2021-05-03 14:43:33,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 106 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 225 transitions. [2021-05-03 14:43:33,341 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 225 transitions. Word has length 19 [2021-05-03 14:43:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:33,341 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 225 transitions. [2021-05-03 14:43:33,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 225 transitions. [2021-05-03 14:43:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:33,341 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:33,342 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:33,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2622,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:33,542 INFO L428 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:33,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1567533644, now seen corresponding path program 508 times [2021-05-03 14:43:33,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:33,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446092578] [2021-05-03 14:43:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:33,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446092578] [2021-05-03 14:43:33,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335508981] [2021-05-03 14:43:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:33,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:43:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:34,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:34,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:34,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:43:34,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:34,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:34,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:34,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:43:34,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:34,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:34,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:34,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:43:34,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:34,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:34,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:43:34,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:34,308 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 15 [2021-05-03 14:43:34,309 INFO L628 ElimStorePlain]: treesize reduction 53, result has 36.9 percent of original size [2021-05-03 14:43:34,309 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:43:34,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:43:34,311 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:121, output treesize:15 [2021-05-03 14:43:34,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:34,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:34,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:34,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022342920] [2021-05-03 14:43:34,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:34,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:34,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:34,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:34,474 INFO L87 Difference]: Start difference. First operand 107 states and 225 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:36,131 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-05-03 14:43:36,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:36,269 INFO L93 Difference]: Finished difference Result 169 states and 350 transitions. [2021-05-03 14:43:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:43:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:36,272 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:43:36,272 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:43:36,272 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1312.8ms TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:43:36,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:43:36,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 107. [2021-05-03 14:43:36,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.1226415094339623) internal successors, (225), 106 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:36,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 225 transitions. [2021-05-03 14:43:36,273 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 225 transitions. Word has length 19 [2021-05-03 14:43:36,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:36,273 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 225 transitions. [2021-05-03 14:43:36,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:36,273 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 225 transitions. [2021-05-03 14:43:36,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:36,274 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:36,274 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:36,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2626 [2021-05-03 14:43:36,474 INFO L428 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:36,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:36,474 INFO L82 PathProgramCache]: Analyzing trace with hash -857485874, now seen corresponding path program 509 times [2021-05-03 14:43:36,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:36,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174647382] [2021-05-03 14:43:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:36,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174647382] [2021-05-03 14:43:36,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824981123] [2021-05-03 14:43:36,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:36,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:43:36,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:36,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:36,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:37,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:37,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:43:37,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478429128] [2021-05-03 14:43:37,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:43:37,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:37,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:43:37,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:43:37,241 INFO L87 Difference]: Start difference. First operand 107 states and 225 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:38,489 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-05-03 14:43:38,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:38,605 INFO L93 Difference]: Finished difference Result 134 states and 279 transitions. [2021-05-03 14:43:38,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:43:38,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:38,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:38,608 INFO L225 Difference]: With dead ends: 134 [2021-05-03 14:43:38,608 INFO L226 Difference]: Without dead ends: 134 [2021-05-03 14:43:38,608 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1167.3ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:43:38,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-03 14:43:38,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 105. [2021-05-03 14:43:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.125) internal successors, (221), 104 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 221 transitions. [2021-05-03 14:43:38,609 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 221 transitions. Word has length 19 [2021-05-03 14:43:38,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:38,609 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 221 transitions. [2021-05-03 14:43:38,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:38,609 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 221 transitions. [2021-05-03 14:43:38,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:38,609 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:38,609 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:38,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2636 [2021-05-03 14:43:38,810 INFO L428 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:38,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:38,810 INFO L82 PathProgramCache]: Analyzing trace with hash 620649532, now seen corresponding path program 510 times [2021-05-03 14:43:38,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:38,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360003175] [2021-05-03 14:43:38,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:39,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360003175] [2021-05-03 14:43:39,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440554393] [2021-05-03 14:43:39,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:39,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:43:39,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:39,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:39,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:39,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:39,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:39,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:43:39,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:39,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:39,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:43:39,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:39,789 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-05-03 14:43:39,789 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:43:39,789 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:43:39,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:43:39,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:39,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:43:39,832 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-05-03 14:43:39,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:43:39,833 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:43:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:39,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:39,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:39,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712279780] [2021-05-03 14:43:39,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:39,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:39,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:39,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:39,942 INFO L87 Difference]: Start difference. First operand 105 states and 221 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:40,256 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 14:43:40,839 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:43:41,322 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 40 [2021-05-03 14:43:41,546 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-05-03 14:43:41,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:41,695 INFO L93 Difference]: Finished difference Result 153 states and 310 transitions. [2021-05-03 14:43:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:43:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:41,698 INFO L225 Difference]: With dead ends: 153 [2021-05-03 14:43:41,698 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 14:43:41,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1678.8ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:43:41,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 14:43:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-05-03 14:43:41,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.125) internal successors, (221), 104 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:41,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 221 transitions. [2021-05-03 14:43:41,699 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 221 transitions. Word has length 19 [2021-05-03 14:43:41,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:41,699 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 221 transitions. [2021-05-03 14:43:41,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 221 transitions. [2021-05-03 14:43:41,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:41,700 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:41,700 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:41,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2646,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:41,900 INFO L428 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:41,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1330697302, now seen corresponding path program 511 times [2021-05-03 14:43:41,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:41,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794433389] [2021-05-03 14:43:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:42,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794433389] [2021-05-03 14:43:42,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223411425] [2021-05-03 14:43:42,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:42,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:42,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:42,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:42,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:43:42,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932920881] [2021-05-03 14:43:42,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:43:42,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:42,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:43:42,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:43:42,642 INFO L87 Difference]: Start difference. First operand 105 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:44,011 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-05-03 14:43:44,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:44,246 INFO L93 Difference]: Finished difference Result 197 states and 394 transitions. [2021-05-03 14:43:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:43:44,248 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:44,248 INFO L225 Difference]: With dead ends: 197 [2021-05-03 14:43:44,248 INFO L226 Difference]: Without dead ends: 197 [2021-05-03 14:43:44,248 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1309.5ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:43:44,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-03 14:43:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 106. [2021-05-03 14:43:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.1523809523809523) internal successors, (226), 105 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:44,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 226 transitions. [2021-05-03 14:43:44,249 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 226 transitions. Word has length 19 [2021-05-03 14:43:44,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:44,249 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 226 transitions. [2021-05-03 14:43:44,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:44,250 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 226 transitions. [2021-05-03 14:43:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:44,250 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:44,250 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:44,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2653 [2021-05-03 14:43:44,450 INFO L428 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:44,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:44,450 INFO L82 PathProgramCache]: Analyzing trace with hash -902354692, now seen corresponding path program 512 times [2021-05-03 14:43:44,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:44,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581821458] [2021-05-03 14:43:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:44,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581821458] [2021-05-03 14:43:44,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719752064] [2021-05-03 14:43:44,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:44,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:43:44,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:43:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:45,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:45,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:43:45,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175689042] [2021-05-03 14:43:45,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:43:45,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:45,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:43:45,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:43:45,233 INFO L87 Difference]: Start difference. First operand 106 states and 226 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:45,526 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 27 [2021-05-03 14:43:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:46,150 INFO L93 Difference]: Finished difference Result 119 states and 248 transitions. [2021-05-03 14:43:46,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:43:46,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:46,153 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:43:46,153 INFO L226 Difference]: Without dead ends: 115 [2021-05-03 14:43:46,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1001.7ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:43:46,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-03 14:43:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 106. [2021-05-03 14:43:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.142857142857143) internal successors, (225), 105 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 225 transitions. [2021-05-03 14:43:46,155 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 225 transitions. Word has length 19 [2021-05-03 14:43:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:46,155 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 225 transitions. [2021-05-03 14:43:46,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:46,155 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 225 transitions. [2021-05-03 14:43:46,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:46,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:46,155 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:46,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2665 [2021-05-03 14:43:46,355 INFO L428 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:46,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:46,356 INFO L82 PathProgramCache]: Analyzing trace with hash -815473458, now seen corresponding path program 513 times [2021-05-03 14:43:46,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:46,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990640327] [2021-05-03 14:43:46,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:46,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990640327] [2021-05-03 14:43:46,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997491264] [2021-05-03 14:43:46,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:46,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:43:46,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:46,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:46,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:47,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:47,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:47,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:43:47,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881506380] [2021-05-03 14:43:47,110 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:43:47,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:47,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:43:47,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:43:47,110 INFO L87 Difference]: Start difference. First operand 106 states and 225 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:48,243 INFO L93 Difference]: Finished difference Result 143 states and 296 transitions. [2021-05-03 14:43:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:43:48,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:48,246 INFO L225 Difference]: With dead ends: 143 [2021-05-03 14:43:48,246 INFO L226 Difference]: Without dead ends: 143 [2021-05-03 14:43:48,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 922.2ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:43:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-03 14:43:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 102. [2021-05-03 14:43:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.118811881188119) internal successors, (214), 101 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 214 transitions. [2021-05-03 14:43:48,247 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 214 transitions. Word has length 19 [2021-05-03 14:43:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:48,247 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 214 transitions. [2021-05-03 14:43:48,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 214 transitions. [2021-05-03 14:43:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:48,248 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:48,248 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:48,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2670,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:48,448 INFO L428 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:48,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:48,448 INFO L82 PathProgramCache]: Analyzing trace with hash -265148748, now seen corresponding path program 514 times [2021-05-03 14:43:48,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:48,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788867402] [2021-05-03 14:43:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:48,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:48,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788867402] [2021-05-03 14:43:48,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443615137] [2021-05-03 14:43:48,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:48,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:43:48,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:48,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:48,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:49,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:49,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:49,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:43:49,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:49,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:49,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:43:49,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:49,489 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 14:43:49,489 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:43:49,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:43:49,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:49,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:43:49,535 INFO L518 ElimStorePlain]: Eliminatee v_prenex_407 vanished before elimination [2021-05-03 14:43:49,535 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:43:49,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:43:49,536 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:43:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:49,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:49,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:49,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756113493] [2021-05-03 14:43:49,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:49,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:49,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:49,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:49,648 INFO L87 Difference]: Start difference. First operand 102 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:50,048 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:43:50,276 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:43:50,732 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-05-03 14:43:51,129 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-05-03 14:43:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:51,503 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-05-03 14:43:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:43:51,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:51,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:51,506 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:43:51,506 INFO L226 Difference]: Without dead ends: 140 [2021-05-03 14:43:51,506 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1751.4ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:43:51,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-03 14:43:51,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 100. [2021-05-03 14:43:51,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.080808080808081) internal successors, (206), 99 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:51,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 206 transitions. [2021-05-03 14:43:51,508 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 206 transitions. Word has length 19 [2021-05-03 14:43:51,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:51,508 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 206 transitions. [2021-05-03 14:43:51,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:51,508 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 206 transitions. [2021-05-03 14:43:51,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:51,508 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:51,508 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:51,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2674 [2021-05-03 14:43:51,713 INFO L428 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:51,713 INFO L82 PathProgramCache]: Analyzing trace with hash 444899022, now seen corresponding path program 515 times [2021-05-03 14:43:51,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:51,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748418064] [2021-05-03 14:43:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:52,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:52,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748418064] [2021-05-03 14:43:52,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558963104] [2021-05-03 14:43:52,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:52,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:43:52,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:43:52,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:52,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:52,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:43:52,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285661338] [2021-05-03 14:43:52,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:43:52,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:52,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:43:52,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:43:52,664 INFO L87 Difference]: Start difference. First operand 100 states and 206 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:53,416 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-05-03 14:43:53,684 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 31 [2021-05-03 14:43:54,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:54,335 INFO L93 Difference]: Finished difference Result 180 states and 354 transitions. [2021-05-03 14:43:54,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:43:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:54,338 INFO L225 Difference]: With dead ends: 180 [2021-05-03 14:43:54,338 INFO L226 Difference]: Without dead ends: 180 [2021-05-03 14:43:54,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1431.2ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:43:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-03 14:43:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 102. [2021-05-03 14:43:54,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.118811881188119) internal successors, (214), 101 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:54,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 214 transitions. [2021-05-03 14:43:54,340 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 214 transitions. Word has length 19 [2021-05-03 14:43:54,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:54,340 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 214 transitions. [2021-05-03 14:43:54,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:54,340 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 214 transitions. [2021-05-03 14:43:54,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:54,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:54,340 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:54,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2681,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:54,540 INFO L428 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1788152972, now seen corresponding path program 516 times [2021-05-03 14:43:54,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:54,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727013442] [2021-05-03 14:43:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:54,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:54,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727013442] [2021-05-03 14:43:54,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078070066] [2021-05-03 14:43:54,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:54,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:43:54,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:54,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:43:54,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:55,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:55,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:43:55,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914500124] [2021-05-03 14:43:55,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:43:55,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:55,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:43:55,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:43:55,468 INFO L87 Difference]: Start difference. First operand 102 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:55,832 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2021-05-03 14:43:56,059 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-05-03 14:43:56,588 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 27 [2021-05-03 14:43:56,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:56,658 INFO L93 Difference]: Finished difference Result 115 states and 234 transitions. [2021-05-03 14:43:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:43:56,661 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:56,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:56,661 INFO L225 Difference]: With dead ends: 115 [2021-05-03 14:43:56,661 INFO L226 Difference]: Without dead ends: 111 [2021-05-03 14:43:56,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1159.8ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:43:56,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-03 14:43:56,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2021-05-03 14:43:56,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.108910891089109) internal successors, (213), 101 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 213 transitions. [2021-05-03 14:43:56,662 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 213 transitions. Word has length 19 [2021-05-03 14:43:56,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:56,662 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 213 transitions. [2021-05-03 14:43:56,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:56,662 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 213 transitions. [2021-05-03 14:43:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:56,662 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:56,662 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:56,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2693,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:56,863 INFO L428 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:56,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:56,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1701271738, now seen corresponding path program 517 times [2021-05-03 14:43:56,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:56,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707891234] [2021-05-03 14:43:56,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:57,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707891234] [2021-05-03 14:43:57,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604164319] [2021-05-03 14:43:57,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:57,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:43:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:43:57,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:57,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:57,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:43:57,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:57,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:57,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:43:57,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:43:57,659 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:43:57,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:43:57,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:43:57,671 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:43:57,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:43:57,694 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:43:57,694 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:43:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:57,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:43:57,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:43:57,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044873219] [2021-05-03 14:43:57,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:43:57,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:43:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:43:57,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:43:57,783 INFO L87 Difference]: Start difference. First operand 102 states and 213 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:58,553 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-05-03 14:43:59,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:43:59,230 INFO L93 Difference]: Finished difference Result 153 states and 311 transitions. [2021-05-03 14:43:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:43:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:43:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:43:59,233 INFO L225 Difference]: With dead ends: 153 [2021-05-03 14:43:59,233 INFO L226 Difference]: Without dead ends: 153 [2021-05-03 14:43:59,233 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1335.3ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:43:59,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-05-03 14:43:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 101. [2021-05-03 14:43:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.11) internal successors, (211), 100 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 211 transitions. [2021-05-03 14:43:59,234 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 211 transitions. Word has length 19 [2021-05-03 14:43:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:43:59,234 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 211 transitions. [2021-05-03 14:43:59,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:43:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 211 transitions. [2021-05-03 14:43:59,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:43:59,234 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:43:59,234 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:43:59,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2697 [2021-05-03 14:43:59,435 INFO L428 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:43:59,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:43:59,435 INFO L82 PathProgramCache]: Analyzing trace with hash 2000468058, now seen corresponding path program 518 times [2021-05-03 14:43:59,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:43:59,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483463624] [2021-05-03 14:43:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:43:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:43:59,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:43:59,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483463624] [2021-05-03 14:43:59,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007667474] [2021-05-03 14:43:59,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:43:59,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:43:59,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:43:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:43:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:00,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:00,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:00,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:00,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460077253] [2021-05-03 14:44:00,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:00,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:00,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:00,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:00,225 INFO L87 Difference]: Start difference. First operand 101 states and 211 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:00,980 INFO L93 Difference]: Finished difference Result 111 states and 226 transitions. [2021-05-03 14:44:00,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:44:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:00,983 INFO L225 Difference]: With dead ends: 111 [2021-05-03 14:44:00,983 INFO L226 Difference]: Without dead ends: 105 [2021-05-03 14:44:00,983 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 810.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:44:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-03 14:44:00,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2021-05-03 14:44:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-05-03 14:44:00,984 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 19 [2021-05-03 14:44:00,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:00,985 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-05-03 14:44:00,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-05-03 14:44:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:00,985 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:00,985 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:01,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2699 [2021-05-03 14:44:01,185 INFO L428 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:01,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:01,185 INFO L82 PathProgramCache]: Analyzing trace with hash 486911438, now seen corresponding path program 519 times [2021-05-03 14:44:01,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:01,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467331188] [2021-05-03 14:44:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:01,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:01,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467331188] [2021-05-03 14:44:01,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71596524] [2021-05-03 14:44:01,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:01,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:44:01,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:01,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:44:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:01,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:01,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:01,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:44:01,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:01,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:01,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:44:01,855 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:01,908 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:44:01,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:01,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:44:01,916 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:44:01,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:01,931 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:44:01,931 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:44:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:02,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:02,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:44:02,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964889014] [2021-05-03 14:44:02,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:44:02,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:02,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:44:02,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:02,005 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:02,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:02,946 INFO L93 Difference]: Finished difference Result 132 states and 268 transitions. [2021-05-03 14:44:02,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:44:02,949 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:02,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:02,949 INFO L225 Difference]: With dead ends: 132 [2021-05-03 14:44:02,949 INFO L226 Difference]: Without dead ends: 132 [2021-05-03 14:44:02,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 664.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:44:02,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-03 14:44:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-05-03 14:44:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 95 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 196 transitions. [2021-05-03 14:44:02,950 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 196 transitions. Word has length 19 [2021-05-03 14:44:02,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:02,950 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 196 transitions. [2021-05-03 14:44:02,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:02,951 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 196 transitions. [2021-05-03 14:44:02,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:02,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:02,951 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:03,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2703,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:03,151 INFO L428 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:03,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1689806674, now seen corresponding path program 520 times [2021-05-03 14:44:03,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:03,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147644707] [2021-05-03 14:44:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:03,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:03,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147644707] [2021-05-03 14:44:03,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175096591] [2021-05-03 14:44:03,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:03,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:44:03,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:03,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:03,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:04,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:04,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:04,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-03 14:44:04,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:04,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:04,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:44:04,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:04,262 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-05-03 14:44:04,263 INFO L628 ElimStorePlain]: treesize reduction 68, result has 36.4 percent of original size [2021-05-03 14:44:04,263 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:44:04,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-05-03 14:44:04,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:04,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:04,332 INFO L518 ElimStorePlain]: Eliminatee v_prenex_413 vanished before elimination [2021-05-03 14:44:04,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:44:04,335 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:44:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:04,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:04,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:04,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812323162] [2021-05-03 14:44:04,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:04,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:04,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:04,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:04,470 INFO L87 Difference]: Start difference. First operand 96 states and 196 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:04,872 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-05-03 14:44:05,113 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2021-05-03 14:44:05,466 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-05-03 14:44:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:05,786 INFO L93 Difference]: Finished difference Result 119 states and 231 transitions. [2021-05-03 14:44:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:05,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:05,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:05,789 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:44:05,789 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:44:05,789 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1308.7ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:44:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:44:05,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2021-05-03 14:44:05,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0631578947368423) internal successors, (196), 95 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:05,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 196 transitions. [2021-05-03 14:44:05,790 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 196 transitions. Word has length 19 [2021-05-03 14:44:05,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:05,790 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 196 transitions. [2021-05-03 14:44:05,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 196 transitions. [2021-05-03 14:44:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:05,791 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:05,791 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:05,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2705,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:05,991 INFO L428 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1245043882, now seen corresponding path program 521 times [2021-05-03 14:44:05,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:05,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450324246] [2021-05-03 14:44:05,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:06,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450324246] [2021-05-03 14:44:06,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438941250] [2021-05-03 14:44:06,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:06,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:44:06,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:06,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:06,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:06,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:06,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:06,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59926320] [2021-05-03 14:44:06,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:06,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:06,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:06,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:06,922 INFO L87 Difference]: Start difference. First operand 96 states and 196 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:07,827 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-03 14:44:08,067 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-05-03 14:44:08,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:08,111 INFO L93 Difference]: Finished difference Result 143 states and 277 transitions. [2021-05-03 14:44:08,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:44:08,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:08,115 INFO L225 Difference]: With dead ends: 143 [2021-05-03 14:44:08,115 INFO L226 Difference]: Without dead ends: 143 [2021-05-03 14:44:08,115 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 972.3ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:44:08,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-03 14:44:08,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 99. [2021-05-03 14:44:08,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1122448979591835) internal successors, (207), 98 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 207 transitions. [2021-05-03 14:44:08,116 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 207 transitions. Word has length 19 [2021-05-03 14:44:08,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:08,116 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 207 transitions. [2021-05-03 14:44:08,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:08,116 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 207 transitions. [2021-05-03 14:44:08,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:08,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:08,116 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:08,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2712,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:08,317 INFO L428 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:08,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:08,317 INFO L82 PathProgramCache]: Analyzing trace with hash 816871420, now seen corresponding path program 522 times [2021-05-03 14:44:08,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:08,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892297330] [2021-05-03 14:44:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:08,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892297330] [2021-05-03 14:44:08,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703473777] [2021-05-03 14:44:08,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:08,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:44:08,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:08,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:44:08,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:09,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:09,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676507590] [2021-05-03 14:44:09,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:09,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:09,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:09,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:09,310 INFO L87 Difference]: Start difference. First operand 99 states and 207 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:10,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:10,249 INFO L93 Difference]: Finished difference Result 109 states and 220 transitions. [2021-05-03 14:44:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:10,252 INFO L225 Difference]: With dead ends: 109 [2021-05-03 14:44:10,252 INFO L226 Difference]: Without dead ends: 105 [2021-05-03 14:44:10,252 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 879.3ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-03 14:44:10,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-05-03 14:44:10,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 98 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:10,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 206 transitions. [2021-05-03 14:44:10,253 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 206 transitions. Word has length 19 [2021-05-03 14:44:10,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:10,253 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 206 transitions. [2021-05-03 14:44:10,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:10,253 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 206 transitions. [2021-05-03 14:44:10,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:10,253 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:10,253 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:10,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2722 [2021-05-03 14:44:10,454 INFO L428 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:10,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:10,454 INFO L82 PathProgramCache]: Analyzing trace with hash 903752654, now seen corresponding path program 523 times [2021-05-03 14:44:10,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:10,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206751246] [2021-05-03 14:44:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:10,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206751246] [2021-05-03 14:44:10,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669952115] [2021-05-03 14:44:10,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:10,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:44:10,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:11,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:11,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:11,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:44:11,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:11,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:11,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:44:11,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:11,382 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:44:11,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:11,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:44:11,395 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:44:11,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:11,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:44:11,417 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:44:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:11,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:11,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:44:11,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061776262] [2021-05-03 14:44:11,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:44:11,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:11,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:44:11,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:11,506 INFO L87 Difference]: Start difference. First operand 99 states and 206 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:12,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:12,160 INFO L93 Difference]: Finished difference Result 123 states and 248 transitions. [2021-05-03 14:44:12,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:44:12,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:12,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:12,163 INFO L225 Difference]: With dead ends: 123 [2021-05-03 14:44:12,163 INFO L226 Difference]: Without dead ends: 123 [2021-05-03 14:44:12,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 680.8ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-05-03 14:44:12,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2021-05-03 14:44:12,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1030927835051547) internal successors, (204), 97 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 204 transitions. [2021-05-03 14:44:12,164 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 204 transitions. Word has length 19 [2021-05-03 14:44:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:12,164 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 204 transitions. [2021-05-03 14:44:12,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 204 transitions. [2021-05-03 14:44:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:12,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:12,165 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:12,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2726,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:12,365 INFO L428 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:12,365 INFO L82 PathProgramCache]: Analyzing trace with hash 310525154, now seen corresponding path program 524 times [2021-05-03 14:44:12,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:12,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490950592] [2021-05-03 14:44:12,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:12,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490950592] [2021-05-03 14:44:12,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146301779] [2021-05-03 14:44:12,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:12,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:44:12,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:12,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:44:12,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:13,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:13,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:13,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219618833] [2021-05-03 14:44:13,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:13,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:13,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:13,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:13,241 INFO L87 Difference]: Start difference. First operand 98 states and 204 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:14,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:14,033 INFO L93 Difference]: Finished difference Result 108 states and 217 transitions. [2021-05-03 14:44:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:14,036 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:14,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:14,037 INFO L225 Difference]: With dead ends: 108 [2021-05-03 14:44:14,037 INFO L226 Difference]: Without dead ends: 102 [2021-05-03 14:44:14,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 793.0ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-03 14:44:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2021-05-03 14:44:14,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0927835051546393) internal successors, (203), 97 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 203 transitions. [2021-05-03 14:44:14,038 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 203 transitions. Word has length 19 [2021-05-03 14:44:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:14,038 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 203 transitions. [2021-05-03 14:44:14,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 203 transitions. [2021-05-03 14:44:14,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:14,038 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:14,038 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:14,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2728,525 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:14,239 INFO L428 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:14,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:14,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1203031466, now seen corresponding path program 525 times [2021-05-03 14:44:14,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:14,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123782406] [2021-05-03 14:44:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:14,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123782406] [2021-05-03 14:44:14,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991053519] [2021-05-03 14:44:14,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:14,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:44:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:44:14,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:14,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:14,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:14,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:44:14,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:14,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:14,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:44:14,972 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:15,056 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:44:15,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:15,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:44:15,066 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:44:15,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:15,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:44:15,083 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:44:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:15,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:15,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:44:15,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55743349] [2021-05-03 14:44:15,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:44:15,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:15,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:44:15,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:15,166 INFO L87 Difference]: Start difference. First operand 98 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:15,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:15,902 INFO L93 Difference]: Finished difference Result 130 states and 263 transitions. [2021-05-03 14:44:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:44:15,905 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:15,905 INFO L225 Difference]: With dead ends: 130 [2021-05-03 14:44:15,905 INFO L226 Difference]: Without dead ends: 130 [2021-05-03 14:44:15,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:15,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-03 14:44:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 97. [2021-05-03 14:44:15,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.09375) internal successors, (201), 96 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:15,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 201 transitions. [2021-05-03 14:44:15,907 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 201 transitions. Word has length 19 [2021-05-03 14:44:15,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:15,907 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 201 transitions. [2021-05-03 14:44:15,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 201 transitions. [2021-05-03 14:44:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:15,907 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:15,907 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:16,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2732 [2021-05-03 14:44:16,107 INFO L428 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:16,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1793660092, now seen corresponding path program 526 times [2021-05-03 14:44:16,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:16,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242997794] [2021-05-03 14:44:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:16,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242997794] [2021-05-03 14:44:16,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126861271] [2021-05-03 14:44:16,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:16,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:44:16,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:16,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:16,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:16,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:16,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:16,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876613540] [2021-05-03 14:44:16,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:16,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:16,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:16,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:16,898 INFO L87 Difference]: Start difference. First operand 97 states and 201 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:17,492 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-03 14:44:17,888 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-05-03 14:44:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:18,209 INFO L93 Difference]: Finished difference Result 105 states and 211 transitions. [2021-05-03 14:44:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:18,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:18,212 INFO L225 Difference]: With dead ends: 105 [2021-05-03 14:44:18,212 INFO L226 Difference]: Without dead ends: 97 [2021-05-03 14:44:18,212 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1197.4ms TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:44:18,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-03 14:44:18,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-05-03 14:44:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0833333333333335) internal successors, (200), 96 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 200 transitions. [2021-05-03 14:44:18,213 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 200 transitions. Word has length 19 [2021-05-03 14:44:18,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:18,213 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 200 transitions. [2021-05-03 14:44:18,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:18,213 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 200 transitions. [2021-05-03 14:44:18,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:18,213 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:18,214 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:18,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2734,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:18,414 INFO L428 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:18,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2088829746, now seen corresponding path program 527 times [2021-05-03 14:44:18,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:18,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230985188] [2021-05-03 14:44:18,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:18,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:18,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230985188] [2021-05-03 14:44:18,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160402872] [2021-05-03 14:44:18,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:18,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:44:18,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:18,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:18,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:19,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:19,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:44:19,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99946722] [2021-05-03 14:44:19,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:44:19,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:19,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:44:19,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:19,264 INFO L87 Difference]: Start difference. First operand 97 states and 200 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:19,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:19,912 INFO L93 Difference]: Finished difference Result 114 states and 229 transitions. [2021-05-03 14:44:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:19,915 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:19,916 INFO L225 Difference]: With dead ends: 114 [2021-05-03 14:44:19,916 INFO L226 Difference]: Without dead ends: 114 [2021-05-03 14:44:19,916 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 613.5ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:19,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-03 14:44:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 91. [2021-05-03 14:44:19,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.033333333333333) internal successors, (183), 90 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 183 transitions. [2021-05-03 14:44:19,917 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 183 transitions. Word has length 19 [2021-05-03 14:44:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:19,917 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 183 transitions. [2021-05-03 14:44:19,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 183 transitions. [2021-05-03 14:44:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:19,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:19,917 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:20,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2740 [2021-05-03 14:44:20,118 INFO L428 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:20,118 INFO L82 PathProgramCache]: Analyzing trace with hash 416872966, now seen corresponding path program 528 times [2021-05-03 14:44:20,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:20,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696729382] [2021-05-03 14:44:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:20,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:20,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696729382] [2021-05-03 14:44:20,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671741541] [2021-05-03 14:44:20,623 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:20,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:44:20,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:20,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:20,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:21,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:21,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:21,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-03 14:44:21,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:21,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:21,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:44:21,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:21,419 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-05-03 14:44:21,420 INFO L628 ElimStorePlain]: treesize reduction 60, result has 38.8 percent of original size [2021-05-03 14:44:21,420 INFO L518 ElimStorePlain]: Eliminatee o_2 vanished before elimination [2021-05-03 14:44:21,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-05-03 14:44:21,430 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:21,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:21,494 INFO L518 ElimStorePlain]: Eliminatee v_prenex_421 vanished before elimination [2021-05-03 14:44:21,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-05-03 14:44:21,496 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:121, output treesize:15 [2021-05-03 14:44:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:21,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:21,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:21,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517623362] [2021-05-03 14:44:21,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:21,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:21,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:21,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:21,628 INFO L87 Difference]: Start difference. First operand 91 states and 183 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:22,026 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-05-03 14:44:22,289 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-05-03 14:44:22,670 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-05-03 14:44:22,903 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2021-05-03 14:44:23,222 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2021-05-03 14:44:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:23,491 INFO L93 Difference]: Finished difference Result 117 states and 223 transitions. [2021-05-03 14:44:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:23,494 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:23,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:23,494 INFO L225 Difference]: With dead ends: 117 [2021-05-03 14:44:23,494 INFO L226 Difference]: Without dead ends: 117 [2021-05-03 14:44:23,494 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2062.7ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:44:23,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-03 14:44:23,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2021-05-03 14:44:23,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.033333333333333) internal successors, (183), 90 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 183 transitions. [2021-05-03 14:44:23,495 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 183 transitions. Word has length 19 [2021-05-03 14:44:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:23,495 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 183 transitions. [2021-05-03 14:44:23,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 183 transitions. [2021-05-03 14:44:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:23,496 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:23,496 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:23,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2744,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:23,696 INFO L428 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:23,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:23,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1867908620, now seen corresponding path program 529 times [2021-05-03 14:44:23,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:23,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663196826] [2021-05-03 14:44:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:24,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663196826] [2021-05-03 14:44:24,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3836361] [2021-05-03 14:44:24,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:24,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:24,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:24,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:24,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:44:24,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681480120] [2021-05-03 14:44:24,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:44:24,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:44:24,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:24,825 INFO L87 Difference]: Start difference. First operand 91 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:25,614 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-05-03 14:44:26,364 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-05-03 14:44:26,655 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42 [2021-05-03 14:44:26,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:26,717 INFO L93 Difference]: Finished difference Result 149 states and 278 transitions. [2021-05-03 14:44:26,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:44:26,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:26,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:26,720 INFO L225 Difference]: With dead ends: 149 [2021-05-03 14:44:26,720 INFO L226 Difference]: Without dead ends: 149 [2021-05-03 14:44:26,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1827.3ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:44:26,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-03 14:44:26,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2021-05-03 14:44:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 92 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 190 transitions. [2021-05-03 14:44:26,721 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 190 transitions. Word has length 19 [2021-05-03 14:44:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:26,721 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 190 transitions. [2021-05-03 14:44:26,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:26,722 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 190 transitions. [2021-05-03 14:44:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:26,722 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:26,722 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:26,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2751,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:26,922 INFO L428 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:26,922 INFO L82 PathProgramCache]: Analyzing trace with hash -456062288, now seen corresponding path program 530 times [2021-05-03 14:44:26,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:26,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383298077] [2021-05-03 14:44:26,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:26,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:27,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383298077] [2021-05-03 14:44:27,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907343855] [2021-05-03 14:44:27,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:27,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:44:27,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:44:27,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:28,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:28,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:28,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022326107] [2021-05-03 14:44:28,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:28,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:28,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:28,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:28,048 INFO L87 Difference]: Start difference. First operand 93 states and 190 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:28,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:28,958 INFO L93 Difference]: Finished difference Result 116 states and 221 transitions. [2021-05-03 14:44:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:28,959 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:28,960 INFO L225 Difference]: With dead ends: 116 [2021-05-03 14:44:28,960 INFO L226 Difference]: Without dead ends: 112 [2021-05-03 14:44:28,960 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 1032.7ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:44:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-03 14:44:28,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2021-05-03 14:44:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0543478260869565) internal successors, (189), 92 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:28,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 189 transitions. [2021-05-03 14:44:28,961 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 189 transitions. Word has length 19 [2021-05-03 14:44:28,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:28,961 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 189 transitions. [2021-05-03 14:44:28,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:28,961 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 189 transitions. [2021-05-03 14:44:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:28,961 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:28,961 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:29,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2763 [2021-05-03 14:44:29,161 INFO L428 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:29,162 INFO L82 PathProgramCache]: Analyzing trace with hash -369181054, now seen corresponding path program 531 times [2021-05-03 14:44:29,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:29,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94088328] [2021-05-03 14:44:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:29,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94088328] [2021-05-03 14:44:29,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735412906] [2021-05-03 14:44:29,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:29,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:44:29,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:29,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:29,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:30,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:30,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:30,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:30,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511323223] [2021-05-03 14:44:30,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:30,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:30,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:30,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:30,168 INFO L87 Difference]: Start difference. First operand 93 states and 189 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:31,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:31,036 INFO L93 Difference]: Finished difference Result 130 states and 249 transitions. [2021-05-03 14:44:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:44:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:31,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:31,040 INFO L225 Difference]: With dead ends: 130 [2021-05-03 14:44:31,040 INFO L226 Difference]: Without dead ends: 130 [2021-05-03 14:44:31,040 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1003.7ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:44:31,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-03 14:44:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 92. [2021-05-03 14:44:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 91 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 187 transitions. [2021-05-03 14:44:31,041 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 187 transitions. Word has length 19 [2021-05-03 14:44:31,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:31,041 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 187 transitions. [2021-05-03 14:44:31,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 187 transitions. [2021-05-03 14:44:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:31,041 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:31,041 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:31,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2767,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:31,242 INFO L428 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash -962408554, now seen corresponding path program 532 times [2021-05-03 14:44:31,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:31,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004559963] [2021-05-03 14:44:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:31,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004559963] [2021-05-03 14:44:31,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923267244] [2021-05-03 14:44:31,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:31,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:44:31,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:31,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:31,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:32,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:32,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:32,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:32,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094919544] [2021-05-03 14:44:32,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:32,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:32,263 INFO L87 Difference]: Start difference. First operand 92 states and 187 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:32,721 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-03 14:44:32,983 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-05-03 14:44:33,352 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-05-03 14:44:33,857 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 36 [2021-05-03 14:44:34,221 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-05-03 14:44:34,446 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-05-03 14:44:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:34,519 INFO L93 Difference]: Finished difference Result 117 states and 221 transitions. [2021-05-03 14:44:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:34,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:34,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:34,522 INFO L225 Difference]: With dead ends: 117 [2021-05-03 14:44:34,522 INFO L226 Difference]: Without dead ends: 111 [2021-05-03 14:44:34,522 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2324.4ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:44:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-03 14:44:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2021-05-03 14:44:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.043956043956044) internal successors, (186), 91 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 186 transitions. [2021-05-03 14:44:34,524 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 186 transitions. Word has length 19 [2021-05-03 14:44:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:34,524 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 186 transitions. [2021-05-03 14:44:34,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 186 transitions. [2021-05-03 14:44:34,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:34,524 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:34,524 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:34,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2771 [2021-05-03 14:44:34,729 INFO L428 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:34,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:34,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1819002122, now seen corresponding path program 533 times [2021-05-03 14:44:34,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:34,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825489530] [2021-05-03 14:44:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:35,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825489530] [2021-05-03 14:44:35,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463601040] [2021-05-03 14:44:35,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:35,082 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:44:35,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:35,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:35,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:35,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:35,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131495783] [2021-05-03 14:44:35,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:35,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:35,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:35,629 INFO L87 Difference]: Start difference. First operand 92 states and 186 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:36,558 INFO L93 Difference]: Finished difference Result 139 states and 267 transitions. [2021-05-03 14:44:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:44:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:36,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:36,562 INFO L225 Difference]: With dead ends: 139 [2021-05-03 14:44:36,562 INFO L226 Difference]: Without dead ends: 139 [2021-05-03 14:44:36,562 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 939.1ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:44:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-05-03 14:44:36,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 91. [2021-05-03 14:44:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.0444444444444443) internal successors, (184), 90 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 184 transitions. [2021-05-03 14:44:36,563 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 184 transitions. Word has length 19 [2021-05-03 14:44:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:36,563 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 184 transitions. [2021-05-03 14:44:36,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 184 transitions. [2021-05-03 14:44:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:36,563 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:36,563 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:36,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2776,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:36,764 INFO L428 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash 520726384, now seen corresponding path program 534 times [2021-05-03 14:44:36,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:36,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911172908] [2021-05-03 14:44:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911172908] [2021-05-03 14:44:37,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772148473] [2021-05-03 14:44:37,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:37,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:44:37,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:37,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:44:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:37,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:37,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-05-03 14:44:37,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814649047] [2021-05-03 14:44:37,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:44:37,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:37,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:44:37,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:37,702 INFO L87 Difference]: Start difference. First operand 91 states and 184 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:38,701 INFO L93 Difference]: Finished difference Result 118 states and 221 transitions. [2021-05-03 14:44:38,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:38,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:38,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:38,704 INFO L225 Difference]: With dead ends: 118 [2021-05-03 14:44:38,704 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 14:44:38,704 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1069.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:44:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 14:44:38,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 91. [2021-05-03 14:44:38,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.033333333333333) internal successors, (183), 90 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 183 transitions. [2021-05-03 14:44:38,705 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 183 transitions. Word has length 19 [2021-05-03 14:44:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:38,705 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 183 transitions. [2021-05-03 14:44:38,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:38,705 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 183 transitions. [2021-05-03 14:44:38,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:38,706 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:38,706 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:38,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2780,535 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:38,906 INFO L428 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:38,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:38,906 INFO L82 PathProgramCache]: Analyzing trace with hash 933203842, now seen corresponding path program 535 times [2021-05-03 14:44:38,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:38,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045870248] [2021-05-03 14:44:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:39,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045870248] [2021-05-03 14:44:39,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188201224] [2021-05-03 14:44:39,228 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:44:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:39,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:39,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:39,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:44:39,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:39,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:39,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-05-03 14:44:39,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:39,755 INFO L628 ElimStorePlain]: treesize reduction 28, result has 42.9 percent of original size [2021-05-03 14:44:39,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:39,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-05-03 14:44:39,769 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:44:39,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:39,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:44:39,792 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:63, output treesize:9 [2021-05-03 14:44:39,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:39,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:39,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-03 14:44:39,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301017689] [2021-05-03 14:44:39,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:44:39,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:39,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:44:39,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:44:39,885 INFO L87 Difference]: Start difference. First operand 91 states and 183 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:40,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:40,759 INFO L93 Difference]: Finished difference Result 148 states and 285 transitions. [2021-05-03 14:44:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:44:40,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:40,761 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:44:40,761 INFO L226 Difference]: Without dead ends: 148 [2021-05-03 14:44:40,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 914.7ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:44:40,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-03 14:44:40,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 90. [2021-05-03 14:44:40,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-05-03 14:44:40,762 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 19 [2021-05-03 14:44:40,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:40,762 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-05-03 14:44:40,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:40,762 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-05-03 14:44:40,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:40,763 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:40,763 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:40,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2784 [2021-05-03 14:44:40,963 INFO L428 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:40,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:40,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1591702246, now seen corresponding path program 536 times [2021-05-03 14:44:40,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:40,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443786270] [2021-05-03 14:44:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:40,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:41,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:41,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443786270] [2021-05-03 14:44:41,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645017001] [2021-05-03 14:44:41,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:41,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:44:41,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-03 14:44:41,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:41,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:41,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-05-03 14:44:41,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8037299] [2021-05-03 14:44:41,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:44:41,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:41,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:44:41,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:44:41,835 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:42,115 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 27 [2021-05-03 14:44:42,316 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2021-05-03 14:44:42,482 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 14:44:42,646 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-05-03 14:44:42,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:42,774 INFO L93 Difference]: Finished difference Result 98 states and 191 transitions. [2021-05-03 14:44:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:42,776 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:42,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:42,776 INFO L225 Difference]: With dead ends: 98 [2021-05-03 14:44:42,776 INFO L226 Difference]: Without dead ends: 88 [2021-05-03 14:44:42,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1110.0ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:44:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-03 14:44:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-03 14:44:42,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 87 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:42,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 177 transitions. [2021-05-03 14:44:42,777 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 177 transitions. Word has length 19 [2021-05-03 14:44:42,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:42,777 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 177 transitions. [2021-05-03 14:44:42,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:42,777 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 177 transitions. [2021-05-03 14:44:42,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:44:42,777 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:42,777 INFO L551 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:42,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2786 [2021-05-03 14:44:42,978 INFO L428 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1601710514, now seen corresponding path program 537 times [2021-05-03 14:44:42,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:42,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640637626] [2021-05-03 14:44:42,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:43,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640637626] [2021-05-03 14:44:43,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820288924] [2021-05-03 14:44:43,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:43,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:44:43,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:43,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:44:43,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:43,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:43,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-05-03 14:44:43,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243168788] [2021-05-03 14:44:43,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:44:43,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:43,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:44:43,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:44:43,699 INFO L87 Difference]: Start difference. First operand 88 states and 177 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:44,152 INFO L93 Difference]: Finished difference Result 108 states and 212 transitions. [2021-05-03 14:44:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:44:44,155 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:44:44,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:44,155 INFO L225 Difference]: With dead ends: 108 [2021-05-03 14:44:44,156 INFO L226 Difference]: Without dead ends: 108 [2021-05-03 14:44:44,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:44:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-03 14:44:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 84. [2021-05-03 14:44:44,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9759036144578312) internal successors, (164), 83 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:44,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 164 transitions. [2021-05-03 14:44:44,157 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 164 transitions. Word has length 19 [2021-05-03 14:44:44,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:44,157 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 164 transitions. [2021-05-03 14:44:44,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:44,157 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 164 transitions. [2021-05-03 14:44:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:44:44,157 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:44,157 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:44,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2790 [2021-05-03 14:44:44,357 INFO L428 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:44,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:44,358 INFO L82 PathProgramCache]: Analyzing trace with hash 926464630, now seen corresponding path program 538 times [2021-05-03 14:44:44,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:44,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330901808] [2021-05-03 14:44:44,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:44,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:44,602 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2021-05-03 14:44:45,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:45,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330901808] [2021-05-03 14:44:45,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681552791] [2021-05-03 14:44:45,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:45,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:44:45,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:44:45,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:45,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:45,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:45,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:44:45,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:45,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:45,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:44:45,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:46,092 INFO L628 ElimStorePlain]: treesize reduction 34, result has 45.2 percent of original size [2021-05-03 14:44:46,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:46,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:44:46,102 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:44:46,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:46,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:44:46,127 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:44:46,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:46,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:46,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-05-03 14:44:46,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691924921] [2021-05-03 14:44:46,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:44:46,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:46,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:44:46,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:44:46,247 INFO L87 Difference]: Start difference. First operand 84 states and 164 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:47,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:47,405 INFO L93 Difference]: Finished difference Result 144 states and 270 transitions. [2021-05-03 14:44:47,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:44:47,408 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:44:47,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:47,409 INFO L225 Difference]: With dead ends: 144 [2021-05-03 14:44:47,409 INFO L226 Difference]: Without dead ends: 117 [2021-05-03 14:44:47,409 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2044.7ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:44:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-03 14:44:47,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2021-05-03 14:44:47,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9764705882352942) internal successors, (168), 85 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 168 transitions. [2021-05-03 14:44:47,410 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 168 transitions. Word has length 20 [2021-05-03 14:44:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:47,410 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 168 transitions. [2021-05-03 14:44:47,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:47,410 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 168 transitions. [2021-05-03 14:44:47,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:44:47,410 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:47,410 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:47,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2793 [2021-05-03 14:44:47,613 INFO L428 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:47,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:47,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1503642474, now seen corresponding path program 539 times [2021-05-03 14:44:47,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:47,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236794595] [2021-05-03 14:44:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:47,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:48,280 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2021-05-03 14:44:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:48,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236794595] [2021-05-03 14:44:48,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309986484] [2021-05-03 14:44:48,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:48,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:44:48,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:48,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:44:48,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:49,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:49,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:49,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:44:49,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:49,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:49,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:44:49,174 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:49,281 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 14:44:49,282 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-05-03 14:44:49,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:49,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:44:49,295 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:44:49,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:49,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:44:49,331 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:44:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:49,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:49,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-05-03 14:44:49,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160234130] [2021-05-03 14:44:49,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:44:49,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:49,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:44:49,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:44:49,533 INFO L87 Difference]: Start difference. First operand 86 states and 168 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:51,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:51,114 INFO L93 Difference]: Finished difference Result 140 states and 263 transitions. [2021-05-03 14:44:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:44:51,116 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:44:51,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:51,116 INFO L225 Difference]: With dead ends: 140 [2021-05-03 14:44:51,116 INFO L226 Difference]: Without dead ends: 118 [2021-05-03 14:44:51,116 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 2005.3ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:44:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-03 14:44:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2021-05-03 14:44:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.9767441860465116) internal successors, (170), 86 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 170 transitions. [2021-05-03 14:44:51,117 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 170 transitions. Word has length 20 [2021-05-03 14:44:51,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:51,117 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 170 transitions. [2021-05-03 14:44:51,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 170 transitions. [2021-05-03 14:44:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:44:51,117 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:51,117 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:51,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2797,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:51,318 INFO L428 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:51,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:51,318 INFO L82 PathProgramCache]: Analyzing trace with hash 961820850, now seen corresponding path program 540 times [2021-05-03 14:44:51,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:51,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144879372] [2021-05-03 14:44:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:52,057 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-05-03 14:44:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:52,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144879372] [2021-05-03 14:44:52,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595258959] [2021-05-03 14:44:52,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:52,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:44:52,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:52,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:44:52,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:52,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:52,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:52,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:44:52,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:52,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:52,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:44:52,992 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:53,092 INFO L628 ElimStorePlain]: treesize reduction 37, result has 40.3 percent of original size [2021-05-03 14:44:53,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:53,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:44:53,106 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:44:53,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:53,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:44:53,144 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:44:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:53,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:53,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-05-03 14:44:53,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566497422] [2021-05-03 14:44:53,327 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:44:53,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:44:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:44:53,328 INFO L87 Difference]: Start difference. First operand 87 states and 170 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:54,532 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-05-03 14:44:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:54,621 INFO L93 Difference]: Finished difference Result 138 states and 260 transitions. [2021-05-03 14:44:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:44:54,624 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:44:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:54,624 INFO L225 Difference]: With dead ends: 138 [2021-05-03 14:44:54,624 INFO L226 Difference]: Without dead ends: 119 [2021-05-03 14:44:54,624 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1905.2ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:44:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-03 14:44:54,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 88. [2021-05-03 14:44:54,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.9770114942528736) internal successors, (172), 87 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 172 transitions. [2021-05-03 14:44:54,625 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 172 transitions. Word has length 20 [2021-05-03 14:44:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:54,625 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 172 transitions. [2021-05-03 14:44:54,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 172 transitions. [2021-05-03 14:44:54,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:44:54,625 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:54,625 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:54,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2801 [2021-05-03 14:44:54,826 INFO L428 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:54,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:54,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1914174058, now seen corresponding path program 541 times [2021-05-03 14:44:54,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:54,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123483101] [2021-05-03 14:44:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:55,604 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-05-03 14:44:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:55,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123483101] [2021-05-03 14:44:55,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525647069] [2021-05-03 14:44:55,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:55,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:44:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:44:56,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:56,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:56,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:44:56,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:56,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:56,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:44:56,647 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:44:56,753 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-03 14:44:56,754 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-05-03 14:44:56,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:44:56,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:44:56,768 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:44:56,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:44:56,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:44:56,804 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:44:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:56,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:44:56,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-05-03 14:44:56,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231297297] [2021-05-03 14:44:56,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:44:56,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:44:56,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:44:56,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:44:56,985 INFO L87 Difference]: Start difference. First operand 88 states and 172 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:58,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:44:58,322 INFO L93 Difference]: Finished difference Result 136 states and 257 transitions. [2021-05-03 14:44:58,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:44:58,326 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:44:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:44:58,326 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:44:58,326 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:44:58,326 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1948.6ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:44:58,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:44:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 89. [2021-05-03 14:44:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.9772727272727273) internal successors, (174), 88 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 174 transitions. [2021-05-03 14:44:58,327 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 174 transitions. Word has length 20 [2021-05-03 14:44:58,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:44:58,327 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 174 transitions. [2021-05-03 14:44:58,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:44:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 174 transitions. [2021-05-03 14:44:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:44:58,327 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:44:58,327 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:44:58,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2804,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:58,528 INFO L428 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:44:58,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:44:58,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1518788174, now seen corresponding path program 542 times [2021-05-03 14:44:58,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:44:58,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131438969] [2021-05-03 14:44:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:44:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:44:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:44:59,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131438969] [2021-05-03 14:44:59,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599690050] [2021-05-03 14:44:59,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:44:59,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:44:59,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:44:59,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:44:59,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:45:00,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:00,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:00,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:45:00,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:45:00,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:00,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:45:00,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:45:00,492 INFO L628 ElimStorePlain]: treesize reduction 40, result has 38.5 percent of original size [2021-05-03 14:45:00,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:00,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:45:00,502 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:45:00,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:45:00,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:45:00,529 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:45:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:45:00,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:45:00,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-05-03 14:45:00,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711915715] [2021-05-03 14:45:00,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:45:00,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:45:00,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:45:00,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:45:00,708 INFO L87 Difference]: Start difference. First operand 89 states and 174 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:45:02,275 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-05-03 14:45:02,527 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2021-05-03 14:45:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:45:02,648 INFO L93 Difference]: Finished difference Result 150 states and 286 transitions. [2021-05-03 14:45:02,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:45:02,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:45:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:45:02,654 INFO L225 Difference]: With dead ends: 150 [2021-05-03 14:45:02,654 INFO L226 Difference]: Without dead ends: 128 [2021-05-03 14:45:02,654 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2381.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:45:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-03 14:45:02,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 91. [2021-05-03 14:45:02,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.988888888888889) internal successors, (179), 90 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:45:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 179 transitions. [2021-05-03 14:45:02,655 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 179 transitions. Word has length 20 [2021-05-03 14:45:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:45:02,656 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 179 transitions. [2021-05-03 14:45:02,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:45:02,656 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 179 transitions. [2021-05-03 14:45:02,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:45:02,656 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:45:02,656 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:45:02,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2808,543 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:45:02,856 INFO L428 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:45:02,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:45:02,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1079331238, now seen corresponding path program 543 times [2021-05-03 14:45:02,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:45:02,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776389737] [2021-05-03 14:45:02,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:45:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:45:03,483 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2021-05-03 14:45:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:45:03,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776389737] [2021-05-03 14:45:03,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596504242] [2021-05-03 14:45:03,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:45:03,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:45:03,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:45:03,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:45:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:45:04,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:04,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:04,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:45:04,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:45:04,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:04,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-05-03 14:45:04,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:45:04,580 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2021-05-03 14:45:04,582 INFO L628 ElimStorePlain]: treesize reduction 37, result has 43.1 percent of original size [2021-05-03 14:45:04,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:04,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-03 14:45:04,596 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:45:04,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:45:04,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:45:04,635 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:75, output treesize:14 [2021-05-03 14:45:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:45:04,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:45:04,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-05-03 14:45:04,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346497893] [2021-05-03 14:45:04,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:45:04,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:45:04,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:45:04,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:45:04,864 INFO L87 Difference]: Start difference. First operand 91 states and 179 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:45:05,512 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-05-03 14:45:05,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:45:05,905 INFO L93 Difference]: Finished difference Result 115 states and 217 transitions. [2021-05-03 14:45:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:45:05,908 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:45:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:45:05,909 INFO L225 Difference]: With dead ends: 115 [2021-05-03 14:45:05,909 INFO L226 Difference]: Without dead ends: 93 [2021-05-03 14:45:05,909 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1615.8ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:45:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-03 14:45:05,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-03 14:45:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.9891304347826086) internal successors, (183), 92 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:45:05,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 183 transitions. [2021-05-03 14:45:05,910 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 183 transitions. Word has length 20 [2021-05-03 14:45:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:45:05,910 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 183 transitions. [2021-05-03 14:45:05,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:45:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 183 transitions. [2021-05-03 14:45:05,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:45:05,911 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:45:05,911 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:45:06,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2811,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:45:06,125 INFO L428 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:45:06,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:45:06,125 INFO L82 PathProgramCache]: Analyzing trace with hash 537509614, now seen corresponding path program 544 times [2021-05-03 14:45:06,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:45:06,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739501245] [2021-05-03 14:45:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:45:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:45:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:45:06,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739501245] [2021-05-03 14:45:06,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981136972] [2021-05-03 14:45:06,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:45:06,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:45:06,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:45:06,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:45:06,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:45:07,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:07,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:07,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:45:07,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:45:07,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:07,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-05-03 14:45:07,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-03 14:45:07,905 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2021-05-03 14:45:07,906 INFO L628 ElimStorePlain]: treesize reduction 34, result has 42.4 percent of original size [2021-05-03 14:45:07,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-03 14:45:07,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2021-05-03 14:45:07,921 INFO L550 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-03 14:45:07,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:45:07,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:45:07,961 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:83, output treesize:14 [2021-05-03 14:45:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:45:08,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:45:08,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-05-03 14:45:08,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001072424] [2021-05-03 14:45:08,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:45:08,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:45:08,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:45:08,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:45:08,178 INFO L87 Difference]: Start difference. First operand 93 states and 183 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:45:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:45:09,399 INFO L93 Difference]: Finished difference Result 113 states and 214 transitions. [2021-05-03 14:45:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:45:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:45:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:45:09,403 INFO L225 Difference]: With dead ends: 113 [2021-05-03 14:45:09,403 INFO L226 Difference]: Without dead ends: 94 [2021-05-03 14:45:09,403 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1639.4ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:45:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-03 14:45:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-03 14:45:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.989247311827957) internal successors, (185), 93 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:45:09,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 185 transitions. [2021-05-03 14:45:09,405 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 185 transitions. Word has length 20 [2021-05-03 14:45:09,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:45:09,405 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 185 transitions. [2021-05-03 14:45:09,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:45:09,405 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 185 transitions. [2021-05-03 14:45:09,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:45:09,405 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:45:09,405 INFO L551 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:45:09,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2815 [2021-05-03 14:45:09,606 INFO L428 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:45:09,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:45:09,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1489862822, now seen corresponding path program 545 times [2021-05-03 14:45:09,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:45:09,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840131136] [2021-05-03 14:45:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:45:09,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-05-03 14:45:10,278 WARN L222 SmtUtils]: Removed 3 from assertion stack [2021-05-03 14:45:10,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2819 [2021-05-03 14:45:10,279 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 14:45:10,282 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 14:45:10,282 INFO L202 PluginConnector]: Adding new model chromosome-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:45:10 BasicIcfg [2021-05-03 14:45:10,282 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:45:10,282 INFO L168 Benchmark]: Toolchain (without parser) took 845531.64 ms. Allocated memory was 346.0 MB in the beginning and 599.8 MB in the end (delta: 253.8 MB). Free memory was 325.3 MB in the beginning and 398.8 MB in the end (delta: -73.5 MB). Peak memory consumption was 182.8 MB. Max. memory is 16.0 GB. [2021-05-03 14:45:10,283 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 346.0 MB. Free memory is still 326.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:45:10,283 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.73 ms. Allocated memory is still 346.0 MB. Free memory was 325.3 MB in the beginning and 323.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:45:10,283 INFO L168 Benchmark]: Boogie Preprocessor took 18.13 ms. Allocated memory is still 346.0 MB. Free memory was 323.7 MB in the beginning and 322.8 MB in the end (delta: 951.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:45:10,283 INFO L168 Benchmark]: RCFGBuilder took 480.00 ms. Allocated memory is still 346.0 MB. Free memory was 322.7 MB in the beginning and 304.9 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-05-03 14:45:10,283 INFO L168 Benchmark]: TraceAbstraction took 844980.08 ms. Allocated memory was 346.0 MB in the beginning and 599.8 MB in the end (delta: 253.8 MB). Free memory was 330.6 MB in the beginning and 398.8 MB in the end (delta: -68.3 MB). Peak memory consumption was 186.5 MB. Max. memory is 16.0 GB. [2021-05-03 14:45:10,283 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 346.0 MB. Free memory is still 326.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 30.73 ms. Allocated memory is still 346.0 MB. Free memory was 325.3 MB in the beginning and 323.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.13 ms. Allocated memory is still 346.0 MB. Free memory was 323.7 MB in the beginning and 322.8 MB in the end (delta: 951.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 480.00 ms. Allocated memory is still 346.0 MB. Free memory was 322.7 MB in the beginning and 304.9 MB in the end (delta: 17.8 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 844980.08 ms. Allocated memory was 346.0 MB in the beginning and 599.8 MB in the end (delta: 253.8 MB). Free memory was 330.6 MB in the beginning and 398.8 MB in the end (delta: -68.3 MB). Peak memory consumption was 186.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 76). Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 23 for 92ms.. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 844817.7ms, OverallIterations: 551, TraceHistogramMax: 4, EmptinessCheckTime: 161.9ms, AutomataDifference: 378490.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16171 SDtfs, 17365 SDslu, 114475 SDs, 0 SdLazy, 177623 SolverSat, 5643 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 98160.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17799 GetRequests, 6516 SyntacticMatches, 580 SemanticMatches, 10703 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35293 ImplicationChecksByTransitivity, 396751.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=164occurred in iteration=311, InterpolantAutomatonStates: 7616, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1021.2ms AutomataMinimizationTime, 550 MinimizatonAttempts, 16607 StatesRemovedByMinimization, 525 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2178.8ms SsaConstructionTime, 6779.7ms SatisfiabilityAnalysisTime, 336461.8ms InterpolantComputationTime, 19643 NumberOfCodeBlocks, 19643 NumberOfCodeBlocksAsserted, 1863 NumberOfCheckSat, 18549 ConstructedInterpolants, 1078 QuantifiedInterpolants, 203793 SizeOfPredicates, 2892 NumberOfNonLiveVariables, 42376 ConjunctsInSsa, 11693 ConjunctsInUnsatCore, 1094 InterpolantComputations, 6 PerfectInterpolantSequences, 2247/13649 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown